Relatively Low Frequency Magnetic Field Detection System Using Metglas/PZT‐5B Sensor

The magnetoelectric (ME) sensor, a new and promising type of magnetic field sensor with ultrahigh sensitivity. However, there are few reports on the research of real‐time measurement system which can promote its practical application. In this study, a novel real‐time measuring approach for weak AC magnetic fields at relatively low frequency was proposed using Metglas/PZT‐5B magnetoelectric sensors. The system mainly consists of an oscilloscope, a signal generator and a program developed with LabVIEW programming. Real‐time measurement of relatively low frequency magnetic fields have been achieved by using frequency up‐conversion methods,simultaneously display the frequency and magnitude of the magnetic field. As a result, the real‐time measurement system was able to detect a weak AC magnetic field as low as 0.1 nT@1Hz, which is promising to push the ME sensor to practical application.This article is protected by copyright. All rights reserved.