Abstract
In this paper, based on the sensitivity empirical formula, the microsolenoid fluxgate sensor is designed in reverse by making use of optimized parameters. The fabricated microsolenoid fluxgate sensor with a Co-based amorphous ribbon core presents a best sensitivity of 3587 V/T, a power consumption of 20.35 mW, and a linear range of 0–100 μT. The test results show that the sensitivity of the sensor is in good agreement with the theoretical expectation, with an error lower than 4%. The improvement of the core material makes a major contribution to the high sensitivity. The noise power density of the sensor is 0.14 nT/√Hz@1 Hz at the frequency of 100 kHz and the noise rms level is 2.2 nT in the frequency range of 0.1–10 Hz. Reverse design provides a simple and rapid way to optimize the performance of the existing fluxgate sensor for different applications.
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