A miniaturized weak vector detection system for weak magnetic field is proposed

detecting principle of system is analyzed. Using special IC to drive the three axis PNI inductive sensors

realize sensing circuit configuration and data acquisition by STC MCU

and program upper PC display interface based on VC + +language

a miniaturized vector detection system for weak magnetic field

which owns the size of 5 cm × 2. 5 cm and the power consumption is 3 m W

is develop and then calibrate distinguishability and linearity in magnetic shielding cylinder. Results shown that the sensing scheme can obtain the distinguishability of up to 15. 57 n T and linearity working range is of ± 200 μT

and the detection system has advantages of small size

low power consumption

high distinguishability and wider working range

has good application prospect.