AID MEASURING PERMANENT MAGNETIC FIELDS Russian patent published in 1999 - IPC

FIELD: measurement of magnetic fields of vessels. SUBSTANCE: aid measuring permanent magnetic fields includes h measurement transducers and compensation transducer. Each transducer has three mutually orthogonal ferromagnetic converters, output of each being connected to its measurement circuit, excitation generator one output of it being connected to first inputs of all ferromagnetic converters, its second output being connected to second inputs of all measurement circuits. Second input of each ferromagnetic converter is connected to output of compensation unit of constant parts of components of vector of magnetic field of the Earth. Aid is supplemented with 3n information displays, 3n subtractors and 3n normalizing devices. Output of measurement circuit of proper component of magnetic field of compensation transducer is simultaneously connected to inputs of n normalizing devices, output of each of them is connected to first input of corresponding subtractor which second input is linked to output of measurement circuit of same component of magnetic field of vessel of measurement transducer and which output is connected to its own information display. EFFECT: reduced influence of man-made interference caused by induction on long line and shortened total length of connection wires. 1 dwg