| 摘要 |
PURPOSE:To detect the azimuth excellently and accurately by attaching a magnet to a float, floating said float on liquid, and rotatably supporting the float at the center in a solid body by surface tension between the float and the solid body. CONSTITUTION:The float 22 to the lower part of which the magnet 21 is attached is floated in water 25 in a container 29. The surface of the water becomes a convex shape 25A by the surface tension between the ring shaped solid body 23 and the float 22. The float 22 is supported at the center in the solid body 23 so that it can be freely rotated. A Hall element 26 is attached on the north side of the side wall of the container 29. A voltage is applied by a power source 41, and an electric field and a magnetic field caused by a magnet 21 are crossed at a right angle. An electromotive force is obtained from the plane where the electric field and the magnetic field are crossed at a right angle. An output E is obtained through an amplifier 42. When the output E becomes the positive maximum, the Hall element 26 is located to the north. When the rotary angle of the magnet 21 is +90 deg., the output E becomes zero, and the Hall element is located to the east. Thus the azimuth can be detected excellently and accurately. |
