Hjem
  • E-postPer.Lunde@uib.no
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    Allegt. 55
  • Postadresse
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    5020 BERGEN
Vitenskapelig artikkel
  • 2020. Finite‐Amplitude Power Budget Equations for Acoustic Fish Abundance Estimation. Journal of Marine Science and Engineering. 34 sider.
  • 2018. Finite element modeling of ultrasound measurement systems for gas. Comparison with experiments in air. Journal of the Acoustical Society of America. 2613-2625.
  • 2017. Time-of-flight dependency on transducer separation distance in a reflective-path guided-wave ultrasonic flow meter at zero flow conditions. Journal of the Acoustical Society of America. 825-837.
  • 2017. Beam diffraction effects in the backward wave regions of viscoelastic leaky Lamb modes for plate transmission at normal incidence. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 1558-1572.
  • 2016. Power budget equations and calibration factors for fish abundance estimation using scientific echo sounders and sonar systems. Journal of Marine Science and Engineering. 23 sider.
  • 2016. Finite aperture influence on energy concentration, frequency shift, and signal enhancement, for acoustic transmission in the negative group velocity region of the S1 leaky Lamb mode. Proceedings - IEEE Ultrasonics Symposium. 1-4.
  • 2016. Beam diffraction effects in sound transmission of a fluid-embedded viscoelastic plate at normal incidence. Journal of the Acoustical Society of America. EL67-EL72.
  • 2015. Transducer beam diffraction effects in sound transmission near leaky Lamb modes in elastic plates at normal incidence. Proceedings - IEEE Ultrasonics Symposium. 1-4.
  • 2015. Equations describing finite-amplitude effects in acoustic fish abundance estimation. Journal of the Acoustical Society of America. 1949-1949.
  • 2013. The Evolving Epidemiology of Valvular Aortic Stenosis. The Tromsø Study. Heart. 396-400.
  • 2013. Accuracy of real-time single- and multi-beat 3-D speckle tracking echocardiography in vitro. Ultrasound in Medicine and Biology. 1006-1014.
  • 2012. Ultrasonic beam transmission through a water-immersed plate at oblique incidence using a piezoelectric source transducer. Finite element - angular spectrum modeling and measurements. IEEE International Ultrasonics Symposium Proceedings. 1972-1977.
  • 2002. "CFD simulation and installation effects for ultrasonic flow meters in pipes with bends". International Journal of Applied Mechanics and Engineering. 33-64.
  • 2001. "Resonance frequency spectra with convergence tests for piezoceramic disks using the finite element method". Acta Acustica united with Acustica. 271-285.
  • 1997. Effects of strong sound velocity gradients on propagation of low frequency impulse sound: Comparison of FFP predictions and experimental data. Journal of the Acoustical Society of America. 1443-1453.
Rapport
  • 1986. "Sound propagation from a seismic source array", Lecture series given at the University of Bergen, Dept. of Mathematics, May 1986 (Compilation of viewgraphs). .
  • 1986. "Simuleringsprogrammet CAPROS Versjon 1.0. Programvaredokumentasjon". .
  • 1986. "Simuleringsprogrammet CAPROS Versjon 1.0. Brukarinstruksjon". .
  • 1986. "Lydforplantning fra seismisk kildearray. Simuleringsmodellen CAPROS". .
  • 1986. "High precision ultrasonic gas flowmeters. Feasibility study". .
  • 1985. "Helium speech unscrambling". .
  • 1983. "Software documentation of the NUTEC experimental unscrambler". .
  • 1983. "Communication evaluation during a 350 msw operational dive". .
Faglig foredrag
  • 2020. Thickness resonances and dispersion properties of leaky Lamb modes in a steel plate.
Populærvitenskapelig foredrag
  • 2020. SFI Smart Ocean - Flexible and cost-effective monitoring for management of a productive and healthy ocean.
  • 2011. Acoustics, some perspectives.
  • 2009. "Bergen Acoustics – Quo vadis?".
  • 2009. "Acoustics in the Bergen region".
  • 2004. "Bruk av ultralyd til nye måleprosessar".
Vitenskapelig foredrag
  • 2020. Nearfield effects from leaky Lamb modes in a steel plate for normal beam incidence.
  • 2020. Complex dispersion properties of Lamb modes vs. Poisson’s ratio.
  • 2019. Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory.
  • 2019. Elastic wave velocities under methane hydrate growth in Bentheim sandstone.
  • 2019. Characterization of ultrasound transmit-receive measurement systems in air. Comparison with prior work on piezoelectric elements in radial mode vibration.
  • 2019. Acoustic laboratory measurements of hydrate-bearing Bentheim sandstones.
  • 2018. Transmission through an isotropic viscoelastic water-coupled plate using a transmit-receive transducer system.
  • 2018. Comparison of angular spectrum models for baffled piston sound field with finite receiver apertures.
  • 2017. Vibration of a baffled piezoelectric ceramic circular disk in lower radial modes, with near- and farfield sound radiation.
  • 2017. Sound field radiation from a non-uniformly vibrating baffled and circular piezoelectric ceramic disk in radial mode vibration.
  • 2017. Finite aperture effects in the backward wave propagation region of a leaky Lamb mode at normal beam incidence.
  • 2017. Dispersion properties of Lamb and leaky Lamb modes in elastic and viscoelastic plates.
  • 2016. Transducer finite aperture effects in sound transmission near leaky Lamb modes in elastic plates at normal incidence.
  • 2016. Sound velocity measurement method for porous sandstone. Measurements, finite element modelling, and diffraction correction.
  • 2016. Reciprocity calibration method for ultrasonic piezoelectric transducers in air. Comparison of finite element modelling and experimental measurements.
  • 2015. Equations describing finite-amplitude effects in acoustic fish abundance estimation.
  • 2015. A unifying theory explaining different formulations of power budget equations and calibration factors commonly used for fish abundance estimation.
  • 2015. "Volume backscattering of finite-amplitude acoustic waves: Power flow, sampled volume, and scattering cross section".
  • 2015. "Sound velocity measurement method for porous sandstone. Discussion and prelimirary results”.
  • 2015. "Reciprocity calibration method for ultrasonic piezoelectric transducers in air. Comparison of finite element modelling and experimental measurements".
  • 2015. "Characterization of ultrasound transmit-receive measurement systems in air. Comparison of finite element modelling and experimental measurements".
  • 2015. "Beam transmission of water-embedded steel plate at normal incidence. Diffraction effects in the S1 to A3 region”.
  • 2014. Updated results on finite element modeling of a transmit-receive ultrasound measurement system. Comparison with experiments in air.
  • 2013. Ultrasonic beam transmission through a steel plate at oblique incidence: Uniform piston vs. piezoelectric transducer.
  • 2013. Reciprocity calibration method for ultrasonic, piezoelectric transducers in air, including finite element simulations.
  • 2013. Finite element modelling of ultrasound measurement systems for gas. Comparison with experiments in air.
  • 2013. Axial sound field from a non-uniformly vibrating circular sound source mounted in a rigid baffle.
  • 2013. "Reciprocity calibration method for ultrasonic piezoelectric transducers in air”.
  • 2013. "Interaction of a transducer excited ultrasonic beam with an elastic plate. 3D modeling in comparison with experiments”.
  • 2013. "Industrial ultrasound research at UiB/IFT. From gas flow measurement to structural monitoring".
  • 2013. "Finite element modeling of ultrasound measurement systems for gas. Use of a full receiver description in comparison with spherical reciprocity”.
  • 2013. "Finite element modeling of ultrasound measurement systems for gas. System model compared to measurements”.
  • 2012. Sound velocity change owing to the acousto-elastic / plastic effects in steel measured using Acoustic Resonance Technology (ART).
  • 2012. Sonar and power budget equations for backscattering of finite amplitude sound waves, with implications in fishery acoustics for abundance estimation of marine resources.
  • 2012. "Ultrasonic beam transmission through a water-immersed plate at oblique incidence using a piezoelectric source transducer. Finite element - angular spectrum modeling and measurements”.
  • 2012. "Normal incidence ultrasonic beam transmission through a water-immersed plate using a piezoelectric source transducer. Finite element modeling, angular spectrum method and measurements".
  • 2011. Ultrasonic beam interactions with a fluid-immersed steel plate at normal and oblique incidence. Measurement results and comparisons with an angular spectrum method in frequency and time-domains.
  • 2011. Hydrate deposit detection in pipes using ultrasonic guided waves.
  • 2011. Finite element analysis of acoustic beam interactions with a plate at normal incidence. Comparison with a 3D angular spectrum method and measurements.
  • 2011. Diffraction correction in ultrasonic fields for measurements of sound velocity in gas. Conventional and alternative methods.
  • 2010. Handbook of uncertainty calculations, - Fiscal oil metering systems based on ultrasonic duty and master meters.
  • 2010. "Ultrasonic piezoceramic transducers for air, - finite element analysis and measurements".
  • 2010. "Time domain finite element modeling of SH-mode propagation in elastic plates with deposits".
  • 2010. "Measurement of fluid viscosity in pipes using multimode ultrasonic guided wave attenuation".
  • 2010. "Finite element analysis and measurement of ultrasonic piezoceramic transducers in air and water".
  • 2010. "Challenges of ultrasonic quantum measurement of natural gas".
  • 2010. "Challenges and technology trends in fiscal metering of natural gas including measurement of CO2 emission".
  • 2009. "Nonlinear sound propagation fisheries research echo" sounders (abstract).
  • 2009. "Deposit detection using plate waves".
  • 2008. "Ultrasonic signal transmission in plates. Study of a steel plate immersed in water".
  • 2008. "Transdusere for SURF avbildning".
  • 2008. "Simulation of guided waves in a fluid loaded elastic plate".
  • 2008. "Pressure and temperature effects for Ormen Lange ultrasonic gas flow meters, - Results from a follow-up study".
  • 2008. "Nonlinear sound propagation fisheries research echo sounders".
  • 2008. "Handbook of uncertainty calculations, - Ultrasonic fiscal oil metering stations".
  • 2007. Developments in transducer technology and reciprocity in ultrasonic flow meters.
  • 2007. "Trykk- og temperatur-effekter for Ormen Lange ultralyd gassmålere".
  • 2007. "Reciprocal operation of ultrasonic flow meters: Criteria and applications".
  • 2007. "Pressure and temperature effects for Ormen Lange ultrasonic gas flow meters".
  • 2007. "Precision sound velocity cell as reference for gas quality measurement in ultrasonic flow meters. Preliminary results using two candidate methods with argon at low pressure".
  • 2007. "Natural gas quality measurement using ultrasonic flow meters. Development of a prototype Gas Analyzer with results from testing on North Sea gas field data".
  • 2007. "Fiskalmåling av olje med høy vannfraksjon. Sensitivitetsstudie for en turbinmeter-basert målestasjon".
  • 2006. "Reciprocity in electroacoustic measurement systems, and reciprocal operation: Principles and applications to ultrasonic flow metering".
  • 2006. "Mass and energy measurement of natural gas using ultrasonic flow meters. Results from testing on various North Sea gas field data".
  • 2006. "Liquid ultrasonic meters for crude oil measurement".
  • 2006. "Developments in transducer technology and reciprocity in ultrasonic flow meters".
  • 2006. "Developments in transducer technology and reciprocity in ultrasonic flow meters".
  • 2006. "Density and calorific value measurement of natural gas using ultrasonic flow meters. Results from testing on various North Sea gas field data".
  • 2006. "A three-way pulse method for a precision sound velocity measurement cell".
  • 2005. "Reciprocity and its utilization in ultrasonic flow meters".
  • 2005. "Quantification of nonlinear sound propagation effects in fisheries research echo sounders".
  • 2005. "Nonlinear sound propagation effects in fisheries research echo sounders - Measurements and simulations in fresh water".
  • 2005. "Nonlinear effects in fisheries and research echo sounders and sonars".
  • 2005. "Nonlinear effects in a 200 kHz sound beam".
  • 2005. "Liquid ultrasonic meters for crude oil measurement".
  • 2005. "Investigation of precision sound velocity measurements as reference for ultrasonic gas flow meters".
  • 2005. "Finite element modeling of sound propagation from a piezoelectric transducer through an elastic layer".
  • 2005. "Electrical and acoustical response of of a Pz27 piezoelectric ceramic element in air. Finite element analyses and experimental results".
  • 2005. "Density and calorific value measurement in natural gas using ultrasonic flow meters".
  • 2004. "Transient diffraction effects in piezoelectric ultrasonic transducers using finite element modelling".
  • 2004. "Methods for precision sound velocity measurements in pressure cells for gas characterization".
  • 2004. "Mass and energy measurement of natural gas using ultrasonic flow meters. Recent results".
  • 2004. "Finite element modelling of piezoelectric ultrasonic transducer properties in natural gas".
  • 2004. "Convergence and accuracy of the Bergen Code for investigating nonlinear effects in fishery echo sounders".
  • 2003. "Transient diffraction effects in ultrasonic meters for volumetric, mass and energy flow measurement of natural gas".
  • 2003. "Transient diffraction effects in ultrasonic flow meters for gas and liquid".
  • 2003. "Subsea multipath ultrasonic liquid flow meter".
  • 2003. "Signal modelling using the FLOSIM system model in ultrasonic instrumentation for industrial applications".
  • 2003. "Handbook of uncertainty calculations. Fiscal orifice gas and turbine oil metering stations".
  • 2002. "Mass and energy measurement of gas using ultrasonic flow meters".
  • 2002. "Handbook of uncertainty calculations. Ultrasonic fiscal gas metering stations".
  • 2002. "Handbook of uncertainty calculations. Ultrasonic fiscal gas metering stations".
  • 2002. "Endelig element modellering av piezoelektriske transduser vibrasjoner".
  • 2001. "Ultrasonic scattering from liquid droplets in wet gas".
  • 2001. "CFD simulation and installation effects for ultrasonic flow meters in pipes with bends".
  • 2001. "A ray theory approach to investigate the influence of flow velocity profiles on transit times in ultrasonic flow meters for gas and liquid".
  • 2001. "A ray theory approach to investigate the influence of flow velocity profiles on transit times in ultrasonic flow meters for gas and liquid".
  • 2000. "Finite element modeling of piezoceramic disks including radiation into a fluid medium".
  • 2000. "Challenges for improved accuracy and traceability in ultrasonic fiscal flow metering".
  • 2000. "Challenges for improved accuracy and traceability in ultrasonic fiscal flow metering of natural gas".
  • 1999. “Investigation of acoustic properties in wet gas for ultrasonic flowmetering”.
  • 1999. “Effects of deposits on the performance of ultrasonic gas transducers”.
  • 1999. “Comparison of simulation models for ultrasonic propagation in wet gas”.
  • 1999. "Functional enhancements within ultrasonic gas flow measurement".
  • 1999. "FE simulations of piezoceramic disks with a front layer of varying thickness".
  • 1998. “Piezoelectric disks with a front layer. Comparisons of FEM with experimental data”.
  • 1997. "Influence of piezoelectric transducer response on transit time determination using cross-correlation of chirp signals".
  • 1997. "FEM analysis of piezoelectric disks - Method and testing".
  • 1996. "Operation of multipath ultrasonic gas flow meters in noisy environments".
  • 1995. "Radial modes in thick, circular, isotropic and piezoceramic disks".
  • 1995. "Modelling of loss effects in piezoceramic materials, and adaptation to measurements on radial and thickness modes in thin disks".
  • 1994. "On the modelling of causal wave propagation in viscoelastic solids".
  • 1994. "Comparison of models for radial and thickness modes in piezoceramic disks".
  • 1993. "On the modelling of wave propagation in piezoelectric ceramic transducers".
  • 1992. "Comparison of full-wave and ray-tracing synthetic seismograms with emphasis on thin-layer resolution".
  • 1992. "A comparison of full-wave and ray-tracing seismograms with emphasis on thin-layer resolution".
  • 1991. "Seismic wave simulation in exploration and production".
  • 1991. "Interference effects in sound fields transmitted at fluid-fluid and fluid-solid interfaces".
  • 1990. "Aspects of transducer modelling".
  • 1989. "Ultrasonic pulse propagation in stratified multiphase media".
  • 1989. "The interaction of seismic waves with shallow gas structures".
  • 1989. "Pulse generation using a parametric source".
  • 1988. "Årsaker til heliumtaleforvrenging".
  • 1988. "Signalbehandling i parametriske antenner".
  • 1988. "Parametrisk lydkilde. Optimalisering".
  • 1988. "Numerical simulation of ultrasonic flowmeters".
  • 1988. "High resolution shallow seismic surveying using parametric acoustic source technology".
  • 1988. "Full wave simulation of multilayer reflection coefficients in shallow seismics".
  • 1987. "Utvikling av akustiske transdusere for gass-strømmåling".
  • 1987. "Simuleringsverktøy for ultralyd væske og gasstrømningsmåling".
  • 1987. "Simulering av full-bølge lydforplantning i marin seismikk".
  • 1987. "Numerical simulation of ultrasonic flowmeters".
  • 1987. "Modelling of acoustic transducers".
  • 1987. "Full wave elastic modelling for seismic detection of shallow gas".
  • 1987. "Full bølgje FFP simulering for seismisk gasslommedeteksjon".
  • 1987. "FFP-modelling of seismic / elastic waves in horizontally stratified geologies".
  • 1986. "Tredimensjonal FFP modellering av elastiske bølgjer i horisontalt stratifiserte media".
  • 1986. "The influence of diving masks on the formant spectrum of normal speech and helium speech".
  • 1985. "Acoustic transmission line analysis of formants in hyperbaric helium speech".
  • 1984. "Unscrambling of speech in a hyperbaric helium oxygen atmosphere".
  • 1984. "Formantanalyse av hyperbar heliumtale".
  • 1984. "Det matematiske og fysiske grunnlaget for datamaskinell taleprosessering".
Annet produkt
  • 2020. "Sensor apparatus and method for measuring flow”, US patent No. US 10,557,731 B2; filed 2014-12-29, granted 2020.02.11; 48 p.
  • 2020. "Sensor apparatus and method for measuring flow", US Patent Application No. US 2020/0132527 A1; filed Dec. 24, 2019; publ. date April 30, 2020; 47 p.
  • 2019. "Sensor apparatus”, US patent No. US 10,317,262 B2; filed Dec. 29, 2014, granted 2019.06.11. 35 p.
  • 2012. "Stømningsmåleapparat", Norwegian Patent No. 331687, filed 2009.12.22, public available 2011.06.24, granted 2012.02.20. 43 p. .
  • 2012. "Flow measuring apparatus. Ultrasonic flow measurement based on propagating time of Lamb waves", UK patent GB2479115, filed 2009.12.22, granted 2012.03.07. .
  • 2012. "Flow measuring apparatus", US patent No. US 8,141,434 B2, filed 2010.05.07, granted 2012.03.27. 21 p.
Vitenskapelig antologi/Konferanseserie
  • 2000. "GERG project on ultrasonic gas flow meters, Phase II. GERG Technical Monograph TM11. Groupe Européen de Recherches Gazières". VDI Verlag.
Vitenskapelig monografi
  • 2001. "Handbook of uncertainty calculations. Ultrasonic fiscal gas metering stations". Handbook prepared on behalf of the Norwegian Society of Oil and Gas Measurement (NFOGM) and the Norwegian Petroleum Directorate (NPD).
Fagbok
  • 2003. "Handbook of uncertainty calculations. Fiscal orifice gas and turbine oil metering stations" Handbook prepared on behalf of the Norwegian Society for Oil and Gas Measurement (NFOGM), Norwegian Petroleum Directorate (NPD) & Norwegian Society of Chartered Engineers (NIF)(May 2003). Norwegian Society for Oil and Gas Measurement .
Doktorgradsavhandling
  • 2018. Elastic wave velocities and attenuation under methane hydrate growth in Bentheim sandstone - Measurements and modelling.
  • 2015. Diffraction effects in the ultrasonic field of transmitting and receiving circular piezoceramic disks in radial mode vibration. FE modelling and comparison with measurements in air .
  • 2014. Measurement of non-linear acoustoelastic effect in steel using acoustic resonance (PhD thesis).
  • 2014. Interaction of piezoelectric transducer excited ultrasonic pulsed beams with a fluid-embedded viscoelastic plate. Finite element modeling, angular spectrum modeling and measurements (PhD thesis).
  • 2007. "Sound velocity cell for gas characterization" (PhD thesis).
  • 2006. "Effects of nonlinear sound propagation in fisheries research" (PhD thesis).
  • 2000. Finite Element Modeling of Ultrasonic Piezoelectric Transducers. Influence of geometry and material parameters on vibration, response functions and radiated field.
  • 2000. "Finite element modelling of ultrasonic piezoelectric transducers. Influence of geometry and material parameters on vibration response functions and radiated field" (Dr. Scient. thesis).
  • 1987. Analysis and unscrambling of hyperbaric helium speech.
  • 1986. "Analysis and unscrambling of hyperbaric helium speech. Part I and II" (Dr. Philos. thesis).
Sammendrag/abstract
  • 2011. Accuracy of real-time single and multi beat 3D speckle tracking echocardiography in vitro. European Heart Journal-Cardiovascular Imaging. ii5-ii6.
  • 2010. Prognostic significance of mitral flow derived Doppler indices in a general population with normal systolic function: A prospective population-based chort study. The Tromso Study 1994-2009. European Heart Journal. 457-457.
Poster
  • 2013. Measuring stress-state of gas pipelines (Poster presentation).
  • 2011. Diffraction correction for precision measurements of sound velocity in gas. Use of an alternative method for non-uniform piezoelectric transmitting transducer vibration (Poster).
  • 2005. Ikkelineær lydforplantning ved bruk av ekkolodd i firskeriforvaltning.
  • 2005. Consequences of non-linear sound propagation on target strength measurements - preliminary studies.
  • 2005. "Making downhole sensors available at high temperatures".
  • 2005. "Investigation of precision sound velocity measurement methods as reference for ultrasonic gas flow meters".
  • 2005. "Integration methods in ultrasonic flow meters for gas and liquid".
Fagartikkel
  • 2010. Fiskalmåling av olje og gass; - Utfordringer og muligheter med ultralydteknologi. NFOGM-nytt (Norwegian Society of Oil and Gas Measurement). 4 sider.

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