NATURAL-FREQUENCY MEASUREMENT AND BELT-TENSION CALCULATION BASED THEREON
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United States of America Patent
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Jun 11, 2015
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Dec 12, 2012
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Abstract
The tension of a belt is determined accurately at a low cost. A natural-frequency measurement device is configured to measure, in a belt transmission system including at least two pulleys between which a belt is stretched, the natural frequency of the belt based on a vibration generated by hitting a portion of the belt stretched between two adjacent ones of the at least two pulleys, and includes: an acceleration sensor attached to the portion of the belt to sense acceleration resulting from the vibration of the belt; and a measuring instrument configured to measure the natural frequency of the belt based on the acceleration sensed by the acceleration sensor. The measuring instrument transmits the natural frequency to a belt tension calculator which determines the tension of the belt based on the natural frequency.
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