| 摘要 |
A ferroprobe device comprises a flux gate, a second harmonic amplifier, a DC amplifier, an indicating device and power communication lines, a compensating flux gate, the total amount of flux gates is two, cores thereof have different sizes. It also comprises compensating second harmonic cancellation amplifier, DC amplifier and a compensating device. main and compensating flux gates are provided for additional signaling windings connected in a gradient circuit and connected to additional main and compensating second harmonic amplifiers respectively. |
