Abstract:

In this paper, considering the lack of compatibility between large magnetic moment and full-wave recording approach in coaxial coplanar coil devices, bucking coil is used to weaken the primary magnetic field. Then the key technology of state-machines and multitask operation is applied to develop the fullwave recording system with the core of PXI. In the development of the recording system, its characteristics of long period of continuous sampling and high-precision are taken into consideration. Experiments show that the system is stable and reliable, which provides an application platform for method research. It also provides reference for the design of electromagnetic instruments on unmanned aerial vehicles and semi-airborne.

Key words: automatic control, airborne electromagnetic method, bucking coil, PXI, state machine, multitask operation