Abstract
In the line which rolls steel, aluminum, copper, the technique which measures tension of the plate is important for stabilizing the production. As the technique which measures the plate's tension, the vibration techniques required from plate's natural frequency are developed. The method for requiring from the relationship between tension and natural frequency becomes a basis. The method for combining amplitude distribution and attenuation characteristic, etc. is developed in order to raise the detection accuracy for the state of plate. In this study, the effect by the plate-type state did be not corrected from databases, etc., and the technique identified from the panel vibration directly was developed. In the support of the plate, it becomes a distribution in which the stress corresponds to the tension. However, the stress is eased near the plate longitudinal central by the rule of Saint-Venant, and it becomes a uniform distribution. Then, the tension value is calculated from one natural frequency, when the tension distribution is symmetrical. The mean value of tension value calculated from two each natural frequency becomes all tension, when it is asymmetric.
