METHOD FOR DETERMINATION OF MOVING OBJECT LOCATION AND DEVICE FOR ITS REALIZATION Russian patent published in 1997 - IPC

FIELD: instrumentation engineering. SUBSTANCE: to determine moving object location in calibration cycle object is turned through an angle of at least 360 deg, and values of horizontal projections of summary vector of the Earth magnetic field intensity and object magnetic field intensity are determined at four points of magnetic holograph ellipse. Five correcting coefficients of magnetic field are found by measured values. Averaged values of projections of magnetic field vector and gravitational force acceleration are determined on axis of instrument coordinate system in every cycle of navigational measurements. Horizontal projections of magnetic field vector are determined, correction of magnetic field horizontal projections is carried out, increments of rectangular coordinates and object coordinates are determined, and then magnetic azimuth of movement direction is found. Device has three magnetic field sensors, vertical sensors, displacement sensor, unit of calculation of magnetic field horizontal projections, unit of correcting coefficient calculation, magnetic field correction unit, navigational unit, and control unit. In addition, device has conversion and averaging unit which includes first and second units of low-phase filters, switch, analog-to-digital converter, and summing-up unit. Vertical sensors are made as three linear accelerometers. EFFECT: higher efficiency. 8 cl, 3 dwg