A magnetic field and temperature sensing device based on a three-cell differential structure and a measurement method thereof

Abstract

The application discloses a kind of magnetic field and temperature sensing device based on three-unit differential structure and its measurement method, belong to magnetic field and temperature multi-physical quantity sensing technical field.Sensing device includes at least one sensitive unit and signal conditioning circuit;Each sensitive unit includes three subunits, each subunit includes diamond NV color center sensitive material, optical excitation source and photodetector;First, second subunit also includes microwave application structure, the frequency of the microwave excitation signal loaded is preselected, so that the response of the output electric signal of two subunits to magnetic field and temperature change one polarity is same, and the other polarity is opposite;Signal conditioning circuit is different to the output electric signal of third subunit respectively with the output electric signal of first, second subunit, and accordingly output magnetic field or temperature measurement result.The application solves the technical problems that magnetic field and temperature response signal coupling in prior art cannot distinguish the independent contribution of two physical quantities, and common mode noise is difficult to suppress.

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