| 摘要 |
PROBLEM TO BE SOLVED: To provide a tension measuring method and its device for line material, rod material for material capable of accurately and stably detecting proper frequency peak value in the process calculating the tension from the frequency peak by properly calculating vibration waveform of vibration signal from material being measured especially the waveform of vibration signal unavoidably caused without using a vibration device based on a new operation method. SOLUTION: Vibration waveform of a material being measured 3 consisting of a line material, rod material and bard material under tension for laying is measured with a non-contact type vibration measuring means 11 and the frequency analysis of the vibration waveform is conducted by using the maximum entropy method. The tension measuring method judges the frequency of dominant peak as the resonance frequency peak. In this case, it is desirable to set the vibration signal unavoidably caused without using an additional vibration device to the material being measured 3 consisting of line material, rod material and bar material under tension for laying as a measuring object.
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