Azimuth detector for magnet compass

Abstract

Abstract PURPOSE: To detect the azimuth of magnet with a simple constitution and with high accuracy, by detecting the phase of output voltage corresponding to the direction of synthesized magnetic field between the DC magnetic field of the magnet and the rotating magnetic field with rotating magnetic field generator. CONSTITUTION: The ring core 2 is located at the center O of the circle P, and when the synthesized magnetic field C is rotated with the rotation of the rotating magnetic field R, if the magnetic field R and DC field M are opposite, the fields are cancelled each other to cause the field C to be zero and the voltage between the output terminals P 3 and P 4 is zero. Since the position when the field C is tentatively zero is changed with the position of the magnet 1, the zeroed part is changed with the rotation angle of the magnet 1. When the field M of the magnet 1 turns clockwise from the positive direction of the Y axis, the zeroed part moves right from the position of 0°, and if counterclockwise, it moves left. Accordingly, the detection of the change in the zeroed part can tell the revolving position of the magnet 1 with high accuracy. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Atsushi Abe
• 👤 Tamotsu Hagiwara
• 👤 Tadashi Nagao
• 👤 Yoshio Sakai

Bibliographic Details