A kind of electronic compass calibration method

Abstract

The invention discloses a test board for calibrating an electronic compass. The test board comprises a flat plate and a side plate fixed on the flat plate, the side plate is a polygon formed by combining n side walls, the side walls are perpendicular to the flat plate, and the number N of the side walls is equal to or more than 3. The electron compass to be calibrated is arranged on the flat plate, and is arranged close to the outer side of the side walls, the magnetic field value and the angle value of each point, measured by a magnetometer, are recorded, obtained data is processed through aninterpolation technology to obtain a corresponding relationship between the magnetic field and the angle, and a corresponding angle is solved according to the magnetic field value measured by the magnetometer through fusing the corresponding relationship with a roll angle and pitch angle which are measured by an accelerometer, so planar two-dimensional high-precision calibration requirements arerealized, and three-dimensional total-space stereo high-precision calibration requirements are also realized. The test board has the advantages of simple structure, convenience in operation, no need of a complicated test device, brining of great convenience for the use of a end user, and realization of self calibration of the electronic compass by the terminal user.

Description

technical field [0001] The invention relates to the technical field of using an electronic compass for navigation, in particular to a calibration method for calibrating an electronic compass. Background technique [0002] In recent years, with the progress of society and the development of science and technology, the position and role of positioning and navigation in people's life have become more and more important. The rapid development of positioning and navigation not only affects people's life philosophy, but also profoundly changes people's way of life. Therefore, in different application scenarios, the calibration of positioning and navigation becomes more and more important. For example, in the military field, in order to improve the precision strike capability of weapons such as missiles, the significance and role of precise navigation are particularly prominent. At the same time, how to achieve precise guidance of missiles in the case of GPS signal loss or interfe...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the traditional calibration method used in the existing electronic compass calibration technology, such as the low calibration accuracy of the ellipsoid fitting method, and the need to use a sophisticated and complex special test platform to collect the required magnetic field values ​​and the ellipsoid fitting method. Angle data, there are problems such as complicated operation and high cost. The present invention designs a test board for calibrating the electronic compass with a simple and reasonable structure. By placing the electronic compass at different positions on the test board and recording the magnetic field value measured by the magnetometer and the The angle value of the position, and then through data processing, the corresponding relationship between the magnetic field and the angle can be obtained, and the calibration of the electronic compass is completed. The structure of the test board is simple, and the test process is simple and convenient. Calibration brings great convenience and high calibration accuracy

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