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Related Experiment Video

Updated: May 28, 2025

Magnetic Tweezers for the Measurement of Twist and Torque

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

A Portable Magnetoelectric Gaussmeter Based on Torque Effect.

Jingen Wu¹, Jiacheng Qiao¹, Xianfeng Liang²

¹State Key Laboratory for Manufacturing Systems Engineering, Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Engineering Research Center of Spin Quantum Sensor Chips, Universities of Shaanxi Province, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China.

Sensors (Basel, Switzerland)

|February 13, 2025

Summary

This study introduces a portable magnetoelectric gaussmeter capable of detecting both direct current (DC) and alternating current (AC) magnetic fields. This novel device overcomes limitations of previous sensors, enabling versatile magnetic field measurements.

Keywords:

magnetoelectric gaussmeter portable device torque effect

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Last Updated: May 28, 2025

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Area of Science:

Materials Science
Electrical Engineering
Physics

Background:

Magnetoelectric composites show high AC magnetic field sensitivity under DC bias.
Existing DC-biased magnetoelectric sensors cannot detect DC magnetic fields due to signal interference.

Purpose of the Study:

To demonstrate a portable magnetoelectric gaussmeter for detecting both DC and AC magnetic fields.
To overcome the limitations of existing magnetoelectric sensors for DC magnetic field measurement.

Main Methods:

Development of a portable gaussmeter utilizing a magnetoelectric sensor based on the torque effect.
Integration of a charge amplification module, signal processing circuit, power module, and data processing program.

Main Results:

The gaussmeter successfully detects both DC and AC magnetic fields.
Performance includes an intensity range of 0-10 Oe, frequency range of DC-500 Hz, AC detection limit of 0.01 Oe, and DC detection limit of 0.08 Oe.
The device is pocket-sized, low-cost, and powered by a 5V 2A adapter or battery.

Conclusions:

The developed magnetoelectric gaussmeter offers a portable and versatile solution for magnetic field detection.
Its ability to measure both DC and AC fields, along with its portability, highlights its potential as a distributed sensor.