LabVIEW 기반 해양퇴적물의 지음향특성 측정 시스템 구현

Abstract

The purpose of this study is to measure reliable geacoustic properties (compressional wave velocity and attenuation) for marine sediment by implementing a measurement system based on LabVIEW through the instruments of Pci eXtensions for Instrumentation (PXI). To implement system, two algorithms for measuring geoacoustic properties were programmed by the LabVIEW which is one of graphical programming languages. Laboratory determination of geacoustic properties for seven cores collected from the southeastern Yellow Sea has been carried out to verify reliability of this system. The experimental results were compared with the results measured by Automated Velocity Measurement system (Kim et al., 1999) (A). Differences between two systems for the observed velocity are negligible. But velocity of new system (B) revealed stable results. In the case of observed attenuation, the results of the new system relatively revealed a inverse correlation with mean grain size in range of sediments which are smaller than 4.5Φ. Thus, the newly implemented system can be used independently to determine the geoacoustic properties of marine sediment.