Феррозондовые преобразователи слабого магнитного поля на основе стержневых сердечников из аморфных сплавов

Abstract

Ferroprobe magnetic field converters (MFC) are used in the tasks of geophysical and radiophysical research, in the development of civil and special equipment. The MFC is the main element of magnetometric sensor systems. The principle of operation of ferroprobe MFC is based on the transformation of the external constant field strength into an EMF with frequency multiple of the frequency of the alternating current feeding it. The transformation is possible due to the non-linearity of the magnetic characteristics of its cores. In this work, the main results of experimental studies of the developed ferroprobe MFC are presented. This MFC design was implemented based on the use of cores made of amorphous alloys with high magnetic permeability. Structural and circuit design solutions that provide an increase in the transfer function of a ferroprobe MFC when operating at a higher core excitation frequency were investigated. It was stated that the operating frequency of excitation of the cores of the ferroprobe MFC is determined by the magnetic properties of the material from which they are made. It has been established that for sensitive ferroprobe MFC creation, it is advisable to use cores made of amorphous alloys of the AMAG-170 type, which provide operation in the frequency band up to 100 kHz, and therefore have the possibility of potentially increasing the conversion coefficient of the ferroprobe MFC by increasing the core excitation frequency. The highly sensitive ferroprobe MFCs are promising for sensor systems creation.