| 英文摘要 |
To evaluate the cable tensions of a cable-stayed bridge, conventional piezoelectric sensors or force-balanced sensors were applied to measure the vibration signal spectrum of cables. Connected to a signal analyzer(such as a PC) through electrical wires in parallel, those sensors were tied-up to a cable‘s tendon to be measured. However, with limited sensors and signal channels, the measurements of all the cables’ vibrations could be implemented only part by part. Practically, it is difficult to measure all the vibrations simultaneously. To overcome the mentioned difficulty, an innovative optic-fiber health monitoring system on the cables of a cable-stayed bridge was designed in this article. This paper will not only introduce the mechanism of the newly developed system but also to elucidate its application to a real cable-stayed bridge. With the new device, it becomes possible to monitor economically, simultaneously, and regularly all the cables of a cable-stayed bridge even during windy or rainy weather condition. |
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