| 摘要 |
PURPOSE:To reliably determine the degree of configuration defect, by a method wherein configuration is evaluated by employing a detected stress signal as it is or an absolute stress obtained by correcting the detected stress signal by an overall tension according to whether the variation of a gap signal is below or above a given value. CONSTITUTION:An excitation coil 14 and detection coils 20, 22 are disposed along the moving direction of a belt-shaped magnetic substance 18 moving at high speed in order to measure the stress applied to the belt-shaped magnetic substance 18 by utilizing magnetostriction effect. In addition, the stress distribution in the width direction of the belt-shaped magnetic substance 18 is made known by detecting the gap between the detector and the belt-shaped magnetic substance 18, and the configuration of the belt- shaped magnetic substance 18 is evaluated from the stress distribution. When the variation of the gap signal is below a given value, i.e., in a state where configuration is latent, the configuration is latent, the configuration is evaluated by employing the detected stress signal as it is. On the other hand, when the vairation of the gap signal is above the given value, i.e., in a state where the configuration is actualized, the configuration is evaluated by employing an absolute stress obtained by correcting the detected stress signal by an overall tension. |
