Micro-fluxgate sensor

A micro-fluxgate sensor has a double-iron core assembly, a self-oscillating module, a current superimposing and amplifying module and a voltage acquisition module. The double-iron core assembly comprises a first iron core and a second iron core. The first iron core is provided with a first winding coil. The second iron core is provided with a second winding coil. The first winding coil and the second winding coil are respectively connected with an input end of the self-oscillating module, and an output end of the self-oscillating module is respectively connected with the current superimposing and amplifying module and the voltage acquisition module. The fluxgate sensor is simple in processing circuit without manual debugging and is easily integrated.