магнітометр

This paper presents the development and experimental investigation of a magnetometer based on a parametric magnetic inductance sensor integrated into a self-oscillating LC circuit. The sensing element is a single-layer coil with a soft ferromagnetic core, whose inductance varies in response to an external magnetic field. This inductance modulation results in a shift in the oscillator frequency, enabling magnetic field measurements by tracking frequency changes.

Реалізована процедура визначення вертикальної складової вектора напруженості магнітного поля Землі за значенням кута нахилення. Вертикальна складова магнітного поля Землі використовується при розрахунку істинного азимута для корекції можливого нахилу платформи з чутливими елементами.

The procedure of determining the vertical component of the Earth magnetic field is implemented. The procedure is based on using of dip angle. The vertical component of the Earth magnetic field is used for the correction of potential platform inclination when the true azimuth is calculated.

In the paper, the digital compass based on AVR  microcontroller has been developed using MEMS accelerometer-magnetometer LSM303DLHC. The structure and hardware of the digital compass have been developed. The calibration algorithms of the accelerometer and magnetometer of the LSM303DLHC module have been described. The calculation algorithm of the pitch and roll angles has been described. The heading calculation algorithm of the digital compass without tilt compensation and with tilt compensation has been described.