A study of parametric magnetic sensor

Author

Ono, Kazuhiko ; Tanno, Yorimoto

Author_Institution

Fac. of Eng., Shinshu Univ., Nagano, Japan

fYear

1993

fDate

15-19 Nov 1993

Firstpage

1556

Abstract

When the inductance or capacitance of an RLC parallel circuit is changed periodically, parametric oscillations occur under certain conditions. The parametric oscillation circuit of the sensor we have realized consists of a time varying capacitor and a magnetic head. During oscillation, if the inductance of the head changes in response to an external magnetic field, the oscillation voltage is amplitude-modulated. By demodulating therefore it is possible to detect the magnetic field. In this paper, we describe a magnetic sensor based on parametric oscillation. The performance of parametric sensor depends on the magnetic head. We examine the characteristics of three types of magnetic head to be used as part of the parametric magnetic sensor

Keywords

amplitude modulation; electric sensing devices; magnetic fields; magnetic variables measurement; parametric oscillators; RLC parallel circuit; amplitude modulation; capacitance; inductance; magnetic field; magnetic head; parametric magnetic sensor; parametric oscillations; time varying capacitor; Capacitance; Capacitive sensors; Capacitors; Inductance; Magnetic circuits; Magnetic fields; Magnetic heads; Magnetic sensors; RLC circuits; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, Control, and Instrumentation, 1993. Proceedings of the IECON '93., International Conference on

Conference_Location

Maui, HI

Print_ISBN

0-7803-0891-3

Type

conf

DOI

10.1109/IECON.1993.339302

Filename

339302