MAGNETIC COMPASS Russian patent published in 1999 - IPC

FIELD: navigational instrumentation. SUBSTANCE: magnetic compass has pendulum transducer with two ferroprobes which outputs are connected to inputs of first and second amplification and conversion units of autocompensation type whose outputs are linked to inputs of first and second amplifiers with controlled amplification factor. Their control inputs are connected to outputs of reversible counter and outputs are linked to proper inputs of heading indicator and to inputs of first and second formers of modulus which outputs are connected correspondingly to first and second inputs of maximum isolation unit. Output of the latter is connected to inputs of threshold units which outputs are linked to proper inputs of AND gate whose output is coupled to interlocking input of reversible counter. Its input of counting direction is connected to output of second threshold unit and synchronization input is linked to output of pulse generator. EFFECT: high accuracy of measurement of magnetic heading on various geographic latitudes. 2 dwg \