Acquisition of ice properties using mechanical actuation

Thesis (M.Eng.)--Memorial University of Newfoundland, 2002. Engineering and Applied Science Bibliography: leaves 115-116. Research surrounding acoustic resonance properties of ice has increased and now a practical method for depth profiling has been developed. Experiments were performed in real-time...

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Bibliographic Details
Main Author: Wrinch, Michael C., 1972-
Other Authors: Memorial University of Newfoundland. Faculty of Engineering and Applied Science
Format: Thesis
Language:English
Published: 2002
Subjects:
Online Access:http://collections.mun.ca/cdm/ref/collection/theses2/id/277280
Description
Summary:Thesis (M.Eng.)--Memorial University of Newfoundland, 2002. Engineering and Applied Science Bibliography: leaves 115-116. Research surrounding acoustic resonance properties of ice has increased and now a practical method for depth profiling has been developed. Experiments were performed in real-time with high sensitivity, biaxial, wide bandwidth accelerometers (10 KHz bandwidth), which encompassed a high sampling rate of 200 Kb/sec/channel with a 12-bit resolution (36 dB). The implementation of signal processing produced a seismic and resonant signature. Initially repeated results revealed an accurate correlation between ice depth to its characteristic frequency. The required velocity was determined using the time of arrival and the cross-correlation between transducers. Theoretical analysis has indicated that the system will be capable of resolving values close to the theoretically calculated error of less than 6 %: this device therefore can be readily realized as a compact portable field instrument.