In response to the high power consumption issue of domestic magnetometers, a novel low-power architecture approach is proposed. Firstly, a high-efficiency switching power supply combined with multi-level power management is adopted to limit the power consumption of the power circuit and analog circuit. Secondly, a low-power ARM(Advanced RISC Machines) single-core architecture is used, and an intermittent working mode is set to achieve ultra-low power consumption standby for the digital circuit. Finally, an optimal configuration method for polarization time and a collaborative optimization idea reducing the longitudinal relaxation time of the sensor are proposed to lower the power consumption of the polarization circuit. Experiments show that under a 60-second measurement cycle, the power consumption of the low-power magnetometer system is only 39 mW, and it can operate continuously and stably for 13 days when powered by a 2. 2 A·h battery, significantly reducing the overall power consumption. This research provides a systematic solution for the low-power design of domestic magnetometers.

low power consumption, magnetometer, geomagnetic exploration, power consumption evaluation