
Rune ØyerhamnNORCE Norwegian Research Centre
Rune Øyerhamn
Master of Science
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Publications (10)
The objective for this research was twofold: (i) to provide updated estimates of the biomass and distribution of krill in the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) Statistical Area 48, and (ii) to develop knowledge on the marine environment essential for the implementation of an adaptive management system for...
The primary objective for this krill research activity was twofold 1) to conduct a survey that provides updated estimates of the biomass and distribution of krill which are used in models to estimate sustainable yield in CCAMLR Area 48 and
2) to develop knowledge on the marine environment essential for the implementation of a Feed-Back Management (...
Quantitative modeling of ultrasound measurement systems is of considerable value for design, analysis, and interpretation of measurements, methods, and systems. In this work, a model is developed for description of transmit-receive measurement systems based on radial-mode transducer operation in a homogeneous fluid medium. Axisymmetric finite eleme...
A prototype forward-looking acoustic camera for imaging of objects in optically opaque media has been developed and evaluated. Its imaging capability has been successfully verified under simultaneous exposure to a temperature of 125 degree Celsius and a pressure of 720 bar. The current maximum imaging distance is 45 cm. The camera builds upon techn...
There is a need in the oil and gas industry for technology for real time monitoring of subsea structures. National research strategies emphasize the need to develop innovative solutions to detect, contain, and clean up spills. The technology should ideally cover a large area and be able to detect leaks up to 500 m from the sensor. As part of a proj...
The present paper represents an update from [1], based on the work in [2]. The background and motivation for this work are given in [2], and also in [1]. The system model theory, simulation setup and experimental setup are presented in [1, 2]. This summary presents results from [2] not shown in [1]. Comparison of simulation and measurement results...
System modeling can be of considerable value for many applications involving ultrasound measurement systems. The objective of the present work is (a) to develop a system model based on finite element (FE) modeling of the transmitting and receiving transducers and sound propagation in the fluid medium, combined with transmission line modeling of the...
The conventional three-transducer reciprocity calibration method is modied and used to determine the transmitting voltage response of an ultrasonic piezoelectric transducer radiating in air at 1 atm. The transducer used in this work is a piezoelectric ceramic disk with rst radial mode at approximately 100 kHz. The three-transducer reciprocity calib...