| 摘要 |
<p>A load cell comprises a distortion generating body (1) including first and second arms (5A and 5B) each of which has a thickness y and which are arranged in parallel, and thin deformable portions (6A to 6D) of a thickness x, which are coupled to the two ends of each of the first and second arms (5A and 5B) and each of which has flat and curved surfaces facing each other, a height of the distortion generating body (1), a distance between both of the thin deformable portions (6A and 6B; 6C and 6D) coupled with both ends of each of the first and second arms (5A and 5B), and a radius of curvature of the curved surface of the thin deformable portions (6A to 6D) being set to predetermined values H, D, and R, respectively, strain gauges (9) insulatively formed on the flat surfaces of the thin deformable portions coupled with both ends of the first arm (5A), and leading portions (10) connecting the strain gauges (9) to form a bridge circuit. The thickness y is given by a linear equation y = ax + b, and constants a and b are determined by a linear equation p = aq + b indicating the relation between thicknesses p and q with respect to a plurality of standard load cells each of which includes the distortion generating body having predetermined height H, predetermined distance D, and predetermined radius R. Each of the thin deformable portions has a thickness q and a thickness p of each of the first and second arms is set according to the thickness q to give a linear load weight-output voltage characteristic.</p> |
