ロードセルの動的応答特性

抄録

Generally, dynamic response of load cells are studied through a theory of vibration by identifying the loading portion with a mass (m) and the perceive portion with a spring (k). It has been pointed out consequently that output value of the cell becomes excessive due to sympathetic (resonance) phenomena when frequency of the input load becomes larger. Hereupon, dynamic response of test cell, modeled in a cylindrical perceive cell, was examined by numerical simulations which apply an impedance method founded on knocking test and wave theory. From the investigations, it was revealed that the dynamic response of load cell can be expressed by a model on primary decay system, and the magnitude of load should be underestimated as the frequency of input load becomes larger. These results are contrary to the usual common sense.