MAGNETIC COMPASS Russian patent published in 2005 - IPC

FIELD: navigation instrument engineering.

SUBSTANCE: magnetic compass can be used for eliminating electromagnet radiation in magnetic needle compasses. Compass has magnetic sensitive element and electromagnetic deviation compensator placed under magnetic sensitive element. Compensator has three rectangular mutually perpendicular coils with windings: one longitudinal, one lateral and one vertical with magnetic moments of M_x, M_y and M_z correspondingly. Magnetic axes of coils are located in planes that cross vertical of the compass onto which vertical the center of magnetic system of magnetic sensitive element falls down. Longitudinal and lateral coils with windings are disposed one inside the other in such a way that centers of windings are aligned in common point at vertical of the compass. Height of inner coil is equal to distance from top surface of its turns to plane of magnetic system of magnetic sensitive element and is defined by relation , where 2b is height of inner coil, I is current in winding of inner coil, W is number of turns of inner coil, c is half -length of horizontal part of turns of winding of inner coil, π is constant and H is maximal value of horizontal component of magnetic field intensity of winding of internal coil at site where magnetic sensitive element is located.

EFFECT: reduced production cost; improved efficiency of operation; widened range of compensation of magnetic fields.

3 dwg