METHOD FOR MEASURING SHIP MAGNETIC COURSE IN HIGH LATITUDES AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2019 - IPC G01C17/30 

FIELD: instrument engineering.

SUBSTANCE: invention relates to the field of navigational instrument making and can be used in high-latitude magnetic compasses, having rolling error due to action on the magnetosensitive element (MSE) of the compass of the vertical component of the Earth's magnetic field, which are equipped with devices for remote transmission of information on the course. Method consists in fact, that generating signal consisting of magnetic course K_m, yaw angle γ_p and systematic error δ_p from projection of vertical component of terrestrial magnetism, then using angular velocity sensor (AVS) with vertical axis of sensitivity mounted on compass pot, generating a signal proportional to the magnetic course change rate and yaw with error and transmission coefficient K_AVS. Signal AVS is integrated and subtracted from magnetic course sensor (MCS) signal in order to generate an error signal δ_p from influence of projection of vertical component of terrestrial magnetism on rolling. At that, in treatment results there is constant component from error Δ_AVS (integrated drift), which is filtered by a high-pass filter with a time constant T₂ greater than rolling period, after which from signal MCS subtracting signal proportional to vertical component of terrestrial magnetism δ_p. Device realizes proposed method and consists of magnetic course sensor MCS, including MSE cartridges and course converter for generation of electric heading signal, located in bowler, on which is installed AVS. MCS is fixed in gimbal suspension, in addition, device has an external indicator with a computing device.

EFFECT: reduced error of magnetic compass on rolling, the value of which is significant in high latitudes.

2 cl, 1 dwg