DEVICE FOR MEASUREMENT OF MAGNETIC FIELDS Russian patent published in 1999 - IPC

FIELD: measurement of magnetic fields. SUBSTANCE: the device uses series-connected ferrosounding comparison unit 1, digital integrator 3 and digital computer 4, as well as a circuit comprising series-connected filter 10, differential amplifier 11, sign character output via logical unit 13 of modulus code of analog-to-digital converter 12, which are connected to the second inputs of digital computer 4. Its output is connected to the synchronizing input of flip-flop 5 and input of delay element 6. Their outputs are connected respectively to the first and second inputs of control switch 7. The first and second analog input of switch 7 are connected respectively to the first and second outputs of reference voltage source 8, and the third one - to the common wire. The direct and inverted outputs of the flip-flop are connected respectively to the second and third inputs of logical unit 13, and the information input - to the sign character of digital integrator 3. The integrator is connected to the inputs of code-to-current converter 9, whose output is connected to the compensation winding of the ferrosounding comparison unit. Its control winding of copper wire is connected to the input of filter 10, and via a resistor - to the output of switch 7 and to the input of the voltage divider, whose output is connected to the second input of differential amplifier 11. This device measures the induction vector components of magnetic field, accomplishes test check-up of the measuring channel, measurement of temperature in the point of installation of the ferrosounding sensor, and automatic correction of temperature errors. EFFECT: enhanced accuracy of measurement of induction vector component of magnetic field of the Earth. 2 dwg