| 英文摘要 |
Conventionally to evaluate the cable tensions of a cable-stayed bridge, piezoelectric sensors or force balanced sensors are applied to measure the vibration signal spectrum of cables. Connected to a signal analyzer(such as a PC) through parallel signal-transmission-cables, those sensors are attached to the to-be-measured cables. With limited sensors and signal channels, the measurements of all cables are carried out cable-by-cable or part-cables by part-cables. Therefore, measuring all cable vibration simultaneously becomes practically impossible. For overcoming the mentioned difficulties, an innovative optic-fiber health monitoring system on the cables of a cable-stayed bridge is invented in this article. Herein this paper will not only introduce the mechanism of the new sensing system but also the application to a real cable-stayed bridge. With such a sensing system, it becomes possible to monitor all cables of a cable-stayed bridge economically, simultaneously, and regularly. |
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