| 摘要 |
PURPOSE:To obtain a load detector excellent in productivity and having high accuracy, by constituting an electric circuit for calculating the wt. of an article to be weighed so that operation is performed by removing the effect of compression force and tensile force due to moment acting on a load receiver on the basis of eccentric load. CONSTITUTION:A load receiver formed into a hollow rectangular shape is used while quartz vibrators 261-264 are respectively provided to the low rigid parts respectively provided to first and second beams 24, 25 at every two places so as to allow compression force and tensile force to act on each quartz vibrator corresponding to the vertical displacement of a movable part which corresponds to applied load W. Further, an electric circuit 30, which inputs the change of the inherent vibration frequency of each quartz vibrator changing corresponding not only to the compression force and tensile force due to the vertical displacement of the movable part but also the compression force and tensile force due to moment caused by the eccentric load acting on the movable part, is provided and constituted so that load is calculated only from the change due to the vertical displacement of the movable part by removing the change in the inherent vibration frequency due to moment.
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