| 摘要 |
PURPOSE:To evade an error originating from the weight of a detection part and measure the tension of a long-sized body by carrying out arithmetic on the basis of the displacement quantity of a sensing roller based upon the tension of the body to be measured, the displacement quantity of the roller when the tension is zero, and the detected value of a wire diameter detector. CONSTITUTION:A position detector 11 detects the displacement quantity (x) of the sensing roller 1 based upon the tension of the long-sized body 4 to be measured, and its detected value is supplied to an arithmetic controller 2 together with the detected value of the wire diameter detector 18 to calculate the tension of the long-sized body 4. When the tension of the long-sized body applied to the roller 1 is zero, the displacement quantity xt from the reference position of the roller 1 is stored in a storage device 23 under the command of a storage command device 21 and the stored value is read out during arithmetic; and the arithmetic is carried out on the basis of the detected value of the detector 11 and tension T to calculate the real tension value under no influence of the weight of the detection part. |
