| 摘要 |
PURPOSE:To separately display three kinds of forces with high sensitivity by making a bridge by an electric resistance varied by force, and an electric resistance which can be adjusted by the same value as said resistance, and selecting an arrangement on the side of its bridge by a circuit converter. CONSTITUTION:In the rear face of, for instance, a vertical regular square a'b'c'd' being parallel to a center longitudinal axis O'-O'' direction of a stress concentration part 12, the same regular square a''b''c''d'' is placed, and as a hexahedron of four regular square surfaces, distortion gauges Ra'c', Rb'd', Ra'c', and Rb'd' running along diagonal lines a'c', b'd', a''c'', and b''d'' are placed on the surface of each two vertical regular square surfaces a'b'c'd' and a''b''c''d'' being parallel to the axis O'-O'' direction. Subsequently, by all bridges having sides of this order, that which has placed in series a shearing stress 16 or two groups of resistances of Ra'c' and Rb'd', and Ra'c' and Rb'd' becomes the opposite side, and by a half bridge in which two pieces of fixing or adjusting resistances R are its adjacent sides, a distortion output 20' being proportional to a simple stress 20 being parallel to the axial direction is derived by a distortion output 18' being proportional to a simple stress 18 vertical to the axis O'-O'' direction at -45 deg. to Ra'c', and the third bridge which has placed in series the same direction of two groups, for instance, Rb'd' and Rb''d'' by inverting them.
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