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《Earthquake Engineering and Engineering Vibration》 2006-04
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Optoelectronic liquid-level sensor and its application for automatically measuring bridge deflection

Xiong Xiancai~(1),Zhang Peng~(2),Fu Yumei~(2),Zhu Yong~(2),Chen Weimin~(2),Zhang Yongxing~(1)(1.College of Civil Engineering,Chongqing University,Chongqing 400045,China;2.College of OptoelectronicEngineering,Chongqing University,Chongqing 400044,China)  
The deflection is an important parameter that reflects the bridge linear variety.The optoelectronic liquid-level sensor is a novel kind of senor for detecting the connected-pipe liquid-level,and its measurement accuracy is in the 0.1mm level.The bridge deflection measuring system is made up of the optoelectronic liquid-level sensors,connected pipe,485 bus,RS485/232 transition card,computer etc.The system can be applied for multipoint,long-period,online,remote,automatic measurement of long-span bridge deflection and it is not affected by the dust,humidity,and fog in the bridge.At present,the system has been successfully applied in the Dafosi Bridge over Yangtze River in Chongqing.The measuring data show that the system can accurately collect the bridge deflection information and the measured deflection can really reflect the bridge deflection variety,so it is an effective method for automatically measuring the bridge deflection.
【Fund】: 国家自然科学基金重点项目(50135030);; 交通部西部交通科技攻关项目(200131800073)
【CateGory Index】: U446.3
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