| 摘要 |
PURPOSE:To obtain a constant rated output without change in sensitivity even though load applying conditions are changed and to enhance measuring accuracy, by providing a plurality of holes in a columnshaped strain yielding body, and attaching strain gages on the side surfaces of the holes. CONSTITUTION:A plurality of holes 13, whose axial centers are aligned with a neutral line 12 of stress of a circular-cylinder shaped strain yielding body 11, are provided. Strain gages 14 and 15 are attached to the symmetrical positions of each hole 13 with respect to the central axis. When a load is concentrated and applied to the inside of the strain yielding body 11, there is no difference between the strains detected by the gages 14 and 15 since the part of the hole 13 is a neutral point from the viewpoint of stress. From a Wheatstone bridge circuit formed by the strain gages 14 and 15, an electric signal, which accurately corresponds to the applied load, is obtained. |
