Authors: D.I. Ilinsky, V.S. Bezkorovainyi, D.A. Gostishchev, V.P. Kucher

Title of the article: Three-axis ferroprobe magnetometer with pulse compensation

Year: 2026, Issue: 2, Pages: 28-35

Branch of knowledge: 2.5.9. Methods and devices for monitoring and diagnosing materials, products, substances and the natural environment

Index UDK: 620.179.143.5

DOI: 10.26730/1999-4125-2026-2-28-35

Abstract: The article discusses the development of a three-axis ferroprobe magnetometer, which uses a pulse compensation method with alternating switching on of measuring channels. The aim of the work is to eliminate the mutual magnetic influence between the axes, which occurs in classical circuits with constant compensation, and to expand the dynamic measurement range. The basic idea is that the channels corresponding to the three spatial axes are activated strictly in turn. In the active phase of each channel, a synchronized current pulse is applied to its compensation magnetization coil, which sets in advance the necessary compensating field in the core of the ferromodulation sensor. This allows you to keep the sensor's operating point in the center of the conditionally linear section of its transformation function, which minimizes the nonlinearity of the transformation when measuring the external field. This approach completely eliminates the mutual magnetization of neighboring sensors, which is typical for systems with direct current compensation. In addition, the pulse mode of operation of the compensation magnetization coil significantly reduces the overall power consumption and heating of the device. The paper presents a description of the operating principle of the system, an analysis of the time parameters of the measurement cycle based on the electrical characteristics of the coils, and the structure of the hardware implementation with microcontroller control. Field studies have confirmed the high efficiency of the proposed scheme. A significant expansion of the operating range of the measured fields, the preservation of high linearity of the conversion and a significant increase in the refresh rate of the full magnetic induction vector were achieved. The results obtained demonstrate the prospects of this method for creating high-precision and high-speed three-axis magnetometers used in geophysics, non-destructive testing and diagnostic systems.

Key words: ferroprobe magnetometer compensation feedback magnetization coil magnetic field

Receiving date: 14.10.2025

Approval date: 15.05.2026

Publication date: 29.06.2026

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