SUPERCONDUCTIVE MAGNETOMETER Russian patent published in 1997 - IPC

FIELD: measurement constant and low-frequency variable magnetic fields. SUBSTANCE: superconductive magnetometer has sensitive element in the form of two parallel separate parts of high-temperature superconductive compound 1. Each part is placed into modulating coil 2, coils being connected in opposition and their free ends are linked to alternating voltage generator 3 or to controlled phase inverter 10. Receiving coil 4 is wound above each modulating coil. Positioning of modulating and receiving coils can be inverse. Start of one receiving coil is connected to finish of the other one and their free ends are connected via narrow-band amplifier 5 to detector 6 and phase difference meter 8 and further to recording instrument 7. If free ends of modulating coils are connected to controlled phase inverter 10 circuit is arranged as follows: controlling input of phase inverter is connected to low-frequency generator 11, signal input of phase inverter is connected to high-frequency generator 3 which is connected via frequency doubler 9 to input of reference signal of phase-sensitive high-frequency amplifier 12. Free ends of receiving coils are connected in this case to key input of phase- sensitive high-frequency amplifier. Output of phase-sensitive high-frequency amplifier is connected via detector 6 to phase-sensitive low-frequency amplifier 13. Phase-sensitive low-frequency amplifier is connected to recording device. EFFECT: enhanced functional reliability. 3 cl, 3 dwg