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A study on the instrumentation control between global positioning system and LabVIEW software for real-time monitoring applications

Mat Amin, Zulkarnaini and Wan Mohd Akib, Wan Abdul Aziz and Nordin, Zuhaidah (2007) A study on the instrumentation control between global positioning system and LabVIEW software for real-time monitoring applications. In: Persidangan Kebangsaan AWAM 2007, 29-31 Mei 2007, Hotel Helang, Pulau Langkawi, Kedah Darul Aman.

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Abstract

Large engineering structures such as bridges and high rise buildings are subject to deformation due to factors such as changes of ground water level, tidal phenomena, tectonic phenomena, etc. In order to know the safeties of engineering structures, monitoring their real-time displacement and recording their fatigue history are very important. Methods which are often used for such survey, are acceleration integration method, laser distance gauge method and total station method. The acceleration integration method integrates the acceleration, which is measured by acceleration gauge, to obtain the displacement. But its error is relatively large. With the development of Global Positioning System (GPS), the sampling frequency of GPS receiver can reach about 20 times per second, while the location precision can approach 5~10 mm. Now, with the development of GPS technology, deformation monitoring can be done using Real Time Kinematic (RTKGPS) at any time and weather in real-time. With sophisticated GPS receivers, the deformations of the various structures can be monitored in real-time mode with 3D positioning precision to 5-10cm + 1 ppm in only 5-10 minutes by using this technique. It makes survey works become easier, faster, very effective and more impressive for monitoring purpose. Although RTK-GPS can capture 3D coordinates, in real-time, but it cannot be displayed in real time. Therefore any movement cannot be analysed in real time. Hence, an interfacing between computer and GPS receiver are needed to solve this problem. In this paper, an interfacing program was developed using Laboratory Virtual Instrument Engineering Workbench (LabVIEW) software. The software uses a graphical programming language to create a program in a flowchart form. The field works were carried out using TRIMBLE 4800 GPS receivers in real-time mode. The outcomes of this research are beneficial to many parties such as building and bridge managers.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:RTK-GPS, instrumentation control, real-time monitoring
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Geoinformation Science And Engineering (Formerly known)
ID Code:4660
Deposited By: En. Tajul Ariffin Musa
Deposited On:13 Dec 2007 03:49
Last Modified:09 Apr 2012 07:23

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