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US 4,565,099 AGranted
Method and apparatus for determining tension in a cable
AssigneeSmiser Industries, Inc.
InventorWilliam S. Arnold
Life of this patent
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Abstract
A method and apparatus for measuring tension in a suspended cable or the like, wherein the tension may be derived from sensor signals corresponding to the fundamental frequency of vibration in the cable and which enables accurate tension measurements to be made from sensors located at or near the terminal end of a span of cable.
Claims13
An apparatus for measuring tension in a cable or like object comprising:
- sensor means for sensing vibrations occurring in the object, said sensor means further including means for generating a sensor signal indicative of the sensed frequency of vibration in the object under observation;
- filter means for receiving the sensor signal and providing as an output a compensated sensor signal, said filter means having a characteristic frequency response which is substantially the inverse function of the characteristic frequency response of said sensor means;
- tension deriving means for receiving the compensated sensor signal and deriving therefrom a signal analogous to tension.
A method for measuring tension in a cable or like object comprising the steps of:
- sensing vibrations occurring in the object;
- generating a sensor signal indicative of the sensed vibrations;
- normalizing the sensor signal to the lowest frequency component of the sensor signal within the bandwidth of the apparatus;
- deriving a tension value corresponding to the tension in the object under observation from the normalized sensor signal.
1 more element
Dependencies are inferred from the claim text.