Projeto e construção de um sensor magnetico do tipo fluxgate

AUTOR(ES)
DATA DE PUBLICAÇÃO

1999

RESUMO

The aim of this work is to study magnetic sensors like fluxgate and the construction of a fluxgate magnetometer using modulation by pulse width method. This method alIows that the magnetometric system, in open loop, be compatible with digital systems of measurement, preventing, in this way, a possible conversion AD. The magnetometer built is composed of a core of a nanocristaline soft ferromagnetic. material and an electronic circuit able to give an output voltage that is directly proportional to the measured magnetic field. The core construction was done by a lithography processo Its special geometry, in H form, adds some characteristics of cores with open and closed magnetic ways. AlI manufacturing procedures are presented in a detailed form. Experimental measurements were done to obtain operation limits, sensibility and noise. These parameters were taken from the magnetometer. The magnetometer was able to measure magnetic fields like the ones from earth. Operating in open loop, the system could measure fields between :1:170mOe with a band of frequency of 9Hz. Thus, this sensor, with some modifications, could be used to build an electronic compass...Note: The complete abstract is available with the full electronic digital thesis or dissertations

ASSUNTO(S)

indução magnetica bussola magnetometro materiais ferromagneticos

ACESSO AO ARTIGO

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