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DEVICE FOR TENSION FORCE ESTIMATION IN CABLE USING PIEZOELECTRIC ELEMENT AND TENSION FORCE ESTIMATION METHOD THEREOF
DEVICE FOR TENSION FORCE ESTIMATION IN CABLE USING PIEZOELECTRIC ELEMENT AND TENSION FORCE ESTIMATION METHOD THEREOF
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机译：压电元件在电缆中的拉力估算装置及其拉力估算方法
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摘要
The present invention relates to a cable tension change estimating device and a field measurement method for cable tension to monitor the cable tension change installed in a bridge, etc., and has a technical feature of estimating a cable tension change through a vibration plate having a preset natural frequency. . Specifically, the apparatus for estimating a change in cable tension of the present invention includes a piezoelectric element, a diaphragm having a set natural frequency connected to the piezoelectric element, and a pair of fasteners provided at both ends of the diaphragm and fixed to a cable. The device measures a change in the natural frequency of the diaphragm generated when the cable tension is changed. In addition, the field measurement method of the cable tension according to the present invention is a field measurement method of the cable tension using the piezoelectric element to estimate the cable tension, a fixing step of fixing the vibration plate connected to the piezoelectric element to the cable and And calculating an impedance change of the cable by measuring an impedance response (Z') corresponding to the changed natural frequency (f') of the diaphragm according to the change in tension. The present invention having the configuration as described above does not require measurement of vibration characteristics of a cable that varies according to specifications or tensions, and thus does not require equipment such as a separate vibrator, is easy to install, and has the advantage of reliable tension change monitoring.
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