JPS6431054A - Rotation sensor - Google Patents

Abstract

PURPOSE:To obtain the detection accuracy according to planning regardless of the unevenness of the inner surface of a container, by supporting solid mass at the central part of the container filled with a conductive liquid by a support means such as a spring. CONSTITUTION:Solid mass 2 is supported at the central parts 1a of a container 1 filled with a conductive liquid 6 by a support means 3 such as a spring. When the position of the mass 2 displaces to the left or right from the center by the variable external force in the long axis direction of the container 1 accompanied by the gravity or rotation acting on the mass 2 in an inclined direction with the inclination of the container 1, flow passage constricting members 7 go in and out with respect to the left and right container tubular parts. On the side where the member 7 goes in the container tubular part, electric impedance increases by the constriction of a current flow path and, on the side where the member 7 goes out, said impedance decreases. Therefore, on the basis of the change in the electric impedance between a central electrode 4 and a terminal electrode 5, the differential quantity thereof is detected to make it possible to detect an angle of inclination or the angular speed and acceleration of rotation with high accuracy.