Pinciples of Using Integrating GPS and Triazial Accelerometers in Surveying Displacement of Large Span Bridges

Pinciples of Using Integrating GPS and Triazial Accelerometers in Surveying Displacement of Large Span Bridges

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Part of #Pinciples of Using Integrating GPS and Triazial Accelerometers in Surveying Displacement of Large Span Bridges# :

Publishing year : 2006

Conference : Geomatics conference

Number of pages : 7

Abstract: Detailed information on the characteristic deflections of large structures such as bridges and tall buildings can help to determine the "health" of such a structure, as well as to assess whether such deviations are the same as those that the structure was designed to tolerate . Due to the ever-increasing size of some of these structures, a reliable and accurate health monitoring system could detect uncharacteristic vibrations and deflections and help prevent catastrophic consequences. The use of kinematic GPS has been shown in many occasions to be a viable tool for monitoring defects and deflections of large structures through its ability to provide cm level precision at speeds up to 10 Hz with real-time capabilities and with the rover the receiver being able to be positioned at a distance of up to 20 km away from the reference (ideal for long bridges). In addition, the accelerometers have ben proved to be useful for such monitoring, allowing for precise readings at rates up to 1,000 Hz. However, both systems have their limitations, this paper presents the principle of deformation monitoring for bridge, GPS satellite geometry and its impacts on bridge deflection monitoring, the deck (of bridge) geometry adjustment and the 3.Coordinate Transformation and Attitude Determination for the Bridge The deck