Home
  • E-mailPer.Lunde@uib.no
  • Phone+47 55 58 27 86+47 994 93 901
  • Visitor Address
    Allegt. 55
  • Postal Address
    Postboks 7803
    5020 BERGEN
Academic article
  • Øyerhamn, Rune; Mosland, Eivind Nag; Storheim, Espen; Lunde, Per; Vestrheim, Magne. 2018. Finite element modeling of ultrasound measurement systems for gas. Comparison with experiments in air. Journal of the Acoustical Society of America. 2613-2625.
  • Aanes, Magne; Kippersund, Remi André; Lohne, Kjetil Daae; Frøysa, Kjell Eivind; Lunde, Per. 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.
  • Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 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.
  • Lunde, Per; Korneliussen, Rolf. 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 pages.
  • Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 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.
  • Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 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.
  • Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 2015. Transducer beam diffraction effects in sound transmission near leaky Lamb modes in elastic plates at normal incidence. Proceedings - IEEE Ultrasonics Symposium. 1-4.
  • Lunde, Per. 2015. Equations describing finite-amplitude effects in acoustic fish abundance estimation. Journal of the Acoustical Society of America. 1949-1949.
  • Eveborn, Gry Debora Wisthus; Schirmer, Henrik; Heggelund, Geir; Lunde, Per; Rasmussen, Knut. 2013. The Evolving Epidemiology of Valvular Aortic Stenosis. The Tromsø Study. Heart. 396-400.
  • Hjertaas, Johannes Just; Fosså, Henrik; Dybdahl, Grete Lunestad; Grüner, Renate; Lunde, Per; Matre, Knut. 2013. Accuracy of real-time single- and multi-beat 3-D speckle tracking echocardiography in vitro. Ultrasound in Medicine and Biology. 1006-1014.
  • Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 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.
  • Hallanger, Anders; Frøysa, Kjell-Eivind; Lunde, Per. 2002. "CFD simulation and installation effects for ultrasonic flow meters in pipes with bends". International Journal of Applied Mechanics and Engineering. 33-64.
  • Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne. 2001. "Resonance frequency spectra with convergence tests for piezoceramic disks using the finite element method". Acta Acustica united with Acustica. 271-285.
  • Hole, Lars Robert; Lunde, Per; Gjessing, Yngve T. 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.
Report
  • Lunde, Per; Frøysa, Kjell-Eivind. 2007. "Ormen Lange ultrasonic gas flow meters. A study for establishment of corrections for pressure and temperature effects". .
  • Hallanger, Anders; Frøysa, Kjell-Eivind; Lunde, Per. 2007. "Fiscal measurement of oil with high water fraction. Phase 1: Sensitivity study for a turbine meter based fiscal metering station". .
  • Lunde, Per; Vestrheim, Magne. 2007. "Final report for the 2005-06 UoB-CMR "såkorn" project "3D finite element modelling (FEM) of precision non-wetted ultrasonic fiscal flow meters for oil and gas"". .
  • Frøysa, Kjell-Eivind; Lunde, Per. 2002. "Multipath ultrasonic liquid flow meter. Integration method for the 6-path prototype. Basis for implementation". .
  • Hallanger, Anders; Lunde, Per. 2001. "Sluttrapport. SIP - Gassteknologi 1997-2000". .
  • Lunde, Per; Vestrheim, Magne. 1991. "Piezoelectric transducer modelling. Part 1: Basic equations for poled ferroelectric ceramics". .
  • Lunde, Per. 1990. "Modellering av seismisk respons i samband med tynn-lags-problematikk i Nordsjøen. Bruk av fullbølgjemodellen CAPROS". .
  • Vestrheim, Magne; Lunde, Per. 1989. "Presisjons ultralyd gass-strømningsmåler. Del 2 - Utvikling og konstruksjon. Rammespesifikasjoner for akustiske transdusere i en flerstråle ultralyd gasstrømningsmåler. Teknisk notat nr. 2.1". .
  • Vestrheim, Magne; Lunde, Per. 1988. "Shallow gas detection with a parametric seismic source. Phase I: Feasibility study. Part 1". .
  • Lygre, Asle; Lunde, Per; Bø, Reidar; Vestrheim, Magne. 1988. "High precision ultrasonic flowmeter. Sensitivity study. Volume I". .
  • Lunde, Per; Meldahl, Paul; Vestrheim, Magne. 1987. "Full wave elastic modelling for seismic detection of shallow gas". (Expanded version of paper given at 49th Meeting and Technical Exhibition for the European Association of Exploration Geophysicists (EAEG'87), Belgrade, Yugoslavia, June 9-12, 1987). .
  • Lunde, Per; Vestrheim, Magne. 1986. "Simuleringsprogrammet CAPROS Versjon 1.0. Brukarinstruksjon". .
  • Lunde, Per; Vestrheim, Magne. 1986. "Lydforplantning fra seismisk kildearray. Simuleringsmodellen CAPROS". .
  • Vestrheim, Magne; Lygre, Asle; Bø, Reidar; Lunde, Per; Berge, Viktor. 1986. "High precision ultrasonic gas flowmeters. Feasibility study". .
  • Lundblad, Jan Åke; Dalland, Kjell Inge; Andersen, Knut; Hjemgård, Kjell; Hansen, Rolf Kahrs; Lunde, Per; Moe, H.; Thuen, A. 1985. "OTP diver communication project Obtained results and further development". .
  • Andersen, Knut; Dalland, Kjell Inge; Lunde, Per. 1983. "Communication evaluation during a 350 msw operational dive". .
Popular scientific lecture
  • Lunde, Per. 2011. Acoustics, some perspectives.
  • Lunde, Per. 2009. "Bergen Acoustics – Quo vadis?".
  • Lunde, Per. 2009. "Acoustics in the Bergen region".
  • Lunde, Per. 2004. "Bruk av ultralyd til nye måleprosessar".
Academic lecture
  • Øygard, Sigrid Husebø; Pedersen, Geir; Lunde, Per. 2019. Simulations of acoustic transmission loss of Fin whale calls reaching the LoVe Ocean Observatory.
  • Sæther, Mathias; Lunde, Per; Almenningen, Stian; Ersland, Geir. 2019. Elastic wave velocities under methane hydrate growth in Bentheim sandstone.
  • Grindheim, Renate; Lunde, Per; Vestrheim, Magne. 2019. Characterization of ultrasound transmit-receive measurement systems in air. Comparison with prior work on piezoelectric elements in radial mode vibration.
  • Sæther, Mathias; Lunde, Per; Almenningen, Stian; Ersland, Geir. 2019. Acoustic laboratory measurements of hydrate-bearing Bentheim sandstones.
  • Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 2018. Transmission through an isotropic viscoelastic water-coupled plate using a transmit-receive transducer system.
  • Midtbø, Simen Hammervold; Aanes, Magne; Lunde, Per; Vestrheim, Magne. 2018. Comparison of angular spectrum models for baffled piston sound field with finite receiver apertures.
  • Storheim, Espen; Lunde, Per; Vestrheim, Magne. 2017. Vibration of a baffled piezoelectric ceramic circular disk in lower radial modes, with near- and farfield sound radiation.
  • Storheim, Espen; Lunde, Per; Vestrheim, Magne. 2017. Sound field radiation from a non-uniformly vibrating baffled and circular piezoelectric ceramic disk in radial mode vibration.
  • Lohne, Kjetil Daae; Aanes, Magne; Lunde, Per; Vestrheim, Magne. 2017. Finite aperture effects in the backward wave propagation region of a leaky Lamb mode at normal beam incidence.
  • Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 2017. Dispersion properties of Lamb and leaky Lamb modes in elastic and viscoelastic plates.
  • Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 2016. Transducer finite aperture effects in sound transmission near leaky Lamb modes in elastic plates at normal incidence.
  • Sæther, Mathias; Lunde, Per; Ersland, Geir. 2016. Sound velocity measurement method for porous sandstone. Measurements, finite element modelling, and diffraction correction.
  • Andersen, Kenneth Kirkeng; Lunde, Per; Kocbach, Jan Martin. 2016. Reciprocity calibration method for ultrasonic piezoelectric transducers in air. Comparison of finite element modelling and experimental measurements.
  • Lunde, Per. 2015. Equations describing finite-amplitude effects in acoustic fish abundance estimation.
  • Lunde, Per; Korneliussen, Rolf. 2015. A unifying theory explaining different formulations of power budget equations and calibration factors commonly used for fish abundance estimation.
  • Lunde, Per; Pedersen, Audun. 2015. "Volume backscattering of finite-amplitude acoustic waves: Power flow, sampled volume, and scattering cross section".
  • Sæther, Mathias; Lunde, Per. 2015. "Sound velocity measurement method for porous sandstone. Discussion and prelimirary results”.
  • Andersen, Kenneth Kirkeng; Søvik, Andre Adelsten; Lunde, Per; Vestrheim, Magne; Kocbach, Jan Martin. 2015. "Reciprocity calibration method for ultrasonic piezoelectric transducers in air. Comparison of finite element modelling and experimental measurements".
  • Søvik, Andre Adelsten; Andersen, Kenneth Kirkeng; Lunde, Per; Vestrheim, Magne; Kocbach, Jan Martin. 2015. "Characterization of ultrasound transmit-receive measurement systems in air. Comparison of finite element modelling and experimental measurements".
  • Aanes, Magne; Lohne, Kjetil Daae; Storheim, Espen; Lunde, Per; Vestrheim, Magne. 2015. "Beam transmission of water-embedded steel plate at normal incidence. Diffraction effects in the S1 to A3 region”.
  • Hauge, Rune; Mosland, Eivind; Storheim, Espen; Lunde, Per; Vestrheim, Magne; Kocbach, Jan Martin. 2014. Updated results on finite element modeling of a transmit-receive ultrasound measurement system. Comparison with experiments in air.
  • Aanes, Magne; Lunde, Per; Vestrheim, Magne. 2013. Ultrasonic beam transmission through a steel plate at oblique incidence: Uniform piston vs. piezoelectric transducer.
  • Mosland, Eivind; Hauge, Rune; Storheim, Espen; Vestrheim, Magne; Lunde, Per; Kocbach, Jan Martin. 2013. Reciprocity calibration method for ultrasonic, piezoelectric transducers in air, including finite element simulations.
  • Hauge, Rune; Mosland, Eivind; Storheim, Espen; Lunde, Per; Kocbach, Jan. 2013. Finite element modelling of ultrasound measurement systems for gas. Comparison with experiments in air.
  • Frøysa, Kjell-Eivind; Storheim, Espen; Kippersund, Remi andré; Lunde, Per. 2013. Axial sound field from a non-uniformly vibrating circular sound source mounted in a rigid baffle.
  • Mosland, Eivind; Hauge, Rune; Storheim, Espen; Vestrheim, Magne; Lunde, Per; Kocbach, Jan Martin. 2013. "Reciprocity calibration method for ultrasonic piezoelectric transducers in air”.
  • Aanes, Magne; Lunde, Per; Vestrheim, Magne. 2013. "Interaction of a transducer excited ultrasonic beam with an elastic plate. 3D modeling in comparison with experiments”.
  • Lunde, Per; Vestrheim, Magne; Storheim, Espen; Aanes, Magne; Lohne, Kjetil Daae; Kippersund, Remi andré; Eldevik, Simen; Hauge, Rune; Mosland, Eivind; Kocbach, Jan M. 2013. "Industrial ultrasound research at UiB/IFT. From gas flow measurement to structural monitoring".
  • Storheim, Espen; Hauge, Rune; Mosland, Eivind; Lunde, Per; Vestrheim, Magne; Kocbach, Jan Martin. 2013. "Finite element modeling of ultrasound measurement systems for gas. Use of a full receiver description in comparison with spherical reciprocity”.
  • Hauge, Rune; Mosland, Eivind; Storheim, Espen; Lunde, Per; Vestrheim, Magne; Kocbach, Jan Martin. 2013. "Finite element modeling of ultrasound measurement systems for gas. System model compared to measurements”.
  • Eldevik, Simen; Olsen, Åge A.; Lunde, Per. 2012. Sound velocity change owing to the acousto-elastic / plastic effects in steel measured using Acoustic Resonance Technology (ART).
  • Lunde, Per; Pedersen, Audun. 2012. Sonar and power budget equations for backscattering of finite amplitude sound waves, with implications in fishery acoustics for abundance estimation of marine resources.
  • Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 2012. "Ultrasonic beam transmission through a water-immersed plate at oblique incidence using a piezoelectric source transducer. Finite element - angular spectrum modeling and measurements”.
  • Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 2012. "Normal incidence ultrasonic beam transmission through a water-immersed plate using a piezoelectric source transducer. Finite element modeling, angular spectrum method and measurements".
  • Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 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.
  • Kippersund, Remi andré; Lunde, Per; Frøysa, Kjell-Eivind. 2011. Hydrate deposit detection in pipes using ultrasonic guided waves.
  • Aanes, Magne; Lohne, Kjetil Daae; Lunde, Per; Vestrheim, Magne. 2011. Finite element analysis of acoustic beam interactions with a plate at normal incidence. Comparison with a 3D angular spectrum method and measurements.
  • Storheim, Espen; Lunde, Per; Vestrheim, Magne. 2011. Diffraction correction in ultrasonic fields for measurements of sound velocity in gas. Conventional and alternative methods.
  • Lunde, Per; Frøysa, Kjell-Eivind; Lied, Gaute Øverås; Skatvedt, Rolf; Vervik, Steinar. 2010. Handbook of uncertainty calculations, - Fiscal oil metering systems based on ultrasonic duty and master meters.
  • Storheim, Espen; Aanes, Magne; Vestrheim, Magne; Lunde, Per. 2010. "Ultrasonic piezoceramic transducers for air, - finite element analysis and measurements".
  • Kocbach, Jan Martin; Kippersund, Remi andré; Lunde, Per. 2010. "Time domain finite element modeling of SH-mode propagation in elastic plates with deposits".
  • Kippersund, Remi andré; Lunde, Per; Frøysa, Kjell-Eivind. 2010. "Measurement of fluid viscosity in pipes using multimode ultrasonic guided wave attenuation".
  • Aanes, Magne; Storheim, Espen; Vestrheim, Magne; Lunde, Per. 2010. "Finite element analysis and measurement of ultrasonic piezoceramic transducers in air and water".
  • Lunde, Per. 2010. "Challenges of ultrasonic quantum measurement of natural gas".
  • Lunde, Per; Frøysa, Kjell-Eivind; Smørgrav, Skule. 2010. "Challenges and technology trends in fiscal metering of natural gas including measurement of CO2 emission".
  • Pedersen, Audun; Lunde, Per; Korneliussen, Rolf; Vestrheim, Magne; Tichy, Frank; Baker, Andrew C. 2009. "Nonlinear sound propagation fisheries research echo" sounders (abstract).
  • Kippersund, Remi andré; Lunde, Per; Frøysa, Kjell-Eivind. 2009. "Deposit detection using plate waves".
  • Lohne, Kjetil Daae; Vestrheim, Magne; Lunde, Per. 2008. "Ultrasonic signal transmission in plates. Study of a steel plate immersed in water".
  • Deibele, Jochen; Kocbach, Jan M.; Lunde, Per; Angelsen, Bjørn; Johansen, Tonny F. 2008. "Transdusere for SURF avbildning".
  • Kippersund, Remi andré; Kocbach, Jan M.; Lunde, Per. 2008. "Simulation of guided waves in a fluid loaded elastic plate".
  • Lunde, Per; Frøysa, Kjell-Eivind. 2008. "Pressure and temperature effects for Ormen Lange ultrasonic gas flow meters, - Results from a follow-up study".
  • Pedersen, Audun; Lunde, Per; Korneliussen, Rolf; Vestrheim, Magne; Tichy, Frank; Baker, Andrew C. 2008. "Nonlinear sound propagation fisheries research echo sounders".
  • Lunde, Per; Frøysa, Kjell-Eivind; Neumann, Svein; Vervik, Steinar. 2008. "Handbook of uncertainty calculations, - Ultrasonic fiscal oil metering stations".
  • Smørgrav, Skule; Abrahamsen, Atle k.; Lunde, Per; Vestrheim, Magne; Bø, Reidar. 2007. Developments in transducer technology and reciprocity in ultrasonic flow meters.
  • Lunde, Per; Frøysa, Kjell-Eivind. 2007. "Trykk- og temperatur-effekter for Ormen Lange ultralyd gassmålere".
  • Lunde, Per; Vestrheim, Magne; Bø, Reidar; Smørgrav, Skule; Abrahamsen, Atle k. 2007. "Reciprocal operation of ultrasonic flow meters: Criteria and applications".
  • Lunde, Per; Frøysa, Kjell-Eivind; Folkestad, Trond. 2007. "Pressure and temperature effects for Ormen Lange ultrasonic gas flow meters".
  • Lunde, Per; Norli, Petter; Vestrheim, Magne; Kippersund, Remi andré. 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".
  • Frøysa, Kjell-Eivind; Lunde, Per; Lied, Gaute Øverås; Hallanger, Anders. 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".
  • Frøysa, Kjell-Eivind; Hallanger, Anders; Lunde, Per. 2007. "Fiskalmåling av olje med høy vannfraksjon. Sensitivitetsstudie for en turbinmeter-basert målestasjon".
  • Lunde, Per; Vestrheim, Magne; Bø, Reidar. 2006. "Reciprocity in electroacoustic measurement systems, and reciprocal operation: Principles and applications to ultrasonic flow metering".
  • Frøysa, Kjell-Eivind; Lunde, Per. 2006. "Mass and energy measurement of natural gas using ultrasonic flow meters. Results from testing on various North Sea gas field data".
  • Kalivoda, Raymond j.; Lunde, Per. 2006. "Liquid ultrasonic meters for crude oil measurement".
  • Smørgrav, Skule; Abrahamsen, Atle k.; Lunde, Per; Vestrheim, Magne; Bø, Reidar. 2006. "Developments in transducer technology and reciprocity in ultrasonic flow meters".
  • Smørgrav, Skule; Abrahamsen, Atle k.; Lunde, Per; Vestrheim, Magne; Bø, Reidar. 2006. "Developments in transducer technology and reciprocity in ultrasonic flow meters".
  • Frøysa, Kjell-Eivind; Lunde, Per; Paulsen, Anfinn; Jacobsen, Endre. 2006. "Density and calorific value measurement of natural gas using ultrasonic flow meters. Results from testing on various North Sea gas field data".
  • Norli, Petter; Lunde, Per. 2006. "A three-way pulse method for a precision sound velocity measurement cell".
  • Lunde, Per; Vestrheim, Magne; Bø, Reidar; Smørgrav, Skule; Abrahamsen, Atle k. 2005. "Reciprocity and its utilization in ultrasonic flow meters".
  • Pedersen, Audun; Vestrheim, Magne; Lunde, Per. 2005. "Quantification of nonlinear sound propagation effects in fisheries research echo sounders".
  • Pedersen, Audun; Vestrheim, Magne; Lunde, Per. 2005. "Nonlinear sound propagation effects in fisheries research echo sounders - Measurements and simulations in fresh water".
  • Pedersen, Audun; Lunde, Per; Vestrheim, Magne. 2005. "Nonlinear effects in fisheries and research echo sounders and sonars".
  • Tichy, Frank; Solli, H.; Klaveness, H.; Pedersen, Audun; Lunde, Per; Vestrheim, Magne. 2005. "Nonlinear effects in a 200 kHz sound beam".
  • Kalivoda, Raymond j.; Lunde, Per. 2005. "Liquid ultrasonic meters for crude oil measurement".
  • Norli, Petter; Lunde, Per; Vestrheim, Magne. 2005. "Investigation of precision sound velocity measurements as reference for ultrasonic gas flow meters".
  • Lunde, Per; Kippersund, Remi André; Vestrheim, Magne; Frøysa, Kjell-Eivind. 2005. "Finite element modeling of sound propagation from a piezoelectric transducer through an elastic layer".
  • Lohne, Kjetil Daae; Vestrheim, Magne; Lunde, Per. 2005. "Electrical and acoustical response of of a Pz27 piezoelectric ceramic element in air. Finite element analyses and experimental results".
  • Frøysa, Kjell-Eivind; Lunde, Per. 2005. "Density and calorific value measurement in natural gas using ultrasonic flow meters".
  • Lunde, Per; Kippersund, Remi andré; Vestrheim, Magne; Frøysa, Kjell-Eivind. 2004. "Transient diffraction effects in piezoelectric ultrasonic transducers using finite element modelling".
  • Norli, Petter; Lunde, Per; Vestrheim, Magne. 2004. "Methods for precision sound velocity measurements in pressure cells for gas characterization".
  • Frøysa, Kjell-Eivind; Lunde, Per. 2004. "Mass and energy measurement of natural gas using ultrasonic flow meters. Recent results".
  • Kippersund, Remi andré; Lunde, Per; Vestrheim, Magne. 2004. "Finite element modelling of piezoelectric ultrasonic transducer properties in natural gas".
  • Pedersen, Audun; Lunde, Per; Vestrheim, Magne. 2004. "Convergence and accuracy of the Bergen Code for investigating nonlinear effects in fishery echo sounders".
  • Lunde, Per; Frøysa, Kjell-Eivind; Kippersund, Remi andré; Vestrheim, Magne. 2003. "Transient diffraction effects in ultrasonic meters for volumetric, mass and energy flow measurement of natural gas".
  • Lunde, Per; Frøysa, Kjell-Eivind; Vestrheim, Magne. 2003. "Transient diffraction effects in ultrasonic flow meters for gas and liquid".
  • Lunde, Per. 2003. "Subsea multipath ultrasonic liquid flow meter".
  • Lunde, Per; Kippersund, Remi andré; Vestrheim, Magne. 2003. "Signal modelling using the FLOSIM system model in ultrasonic instrumentation for industrial applications".
  • Dahl, Eivind O.; Frøysa, Kjell-Eivind; Lunde, Per. 2003. "Handbook of uncertainty calculations. Fiscal orifice gas and turbine oil metering stations".
  • Lunde, Per; Frøysa, Kjell-Eivind. 2002. "Mass and energy measurement of gas using ultrasonic flow meters".
  • Lunde, Per; Frøysa, Kjell-Eivind; Neumann, Svein; Halvorsen, Einar. 2002. "Handbook of uncertainty calculations. Ultrasonic fiscal gas metering stations".
  • Lunde, Per; Frøysa, Kjell-Eivind. 2002. "Handbook of uncertainty calculations. Ultrasonic fiscal gas metering stations".
  • Vestrheim, Magne; Lunde, Per; Fardal, Rune. 2002. "Endelig element modellering av piezoelektriske transduser vibrasjoner".
  • Baker, Andrew C.; Frøysa, Kjell-Eivind; Furset, Hilde; Lunde, Per. 2001. "Ultrasonic scattering from liquid droplets in wet gas".
  • Hallanger, Anders; Frøysa, Kjell-Eivind; Lunde, Per. 2001. "CFD simulation and installation effects for ultrasonic flow meters in pipes with bends".
  • Frøysa, Kjell-Eivind; Lunde, Per; Vestrheim, Magne. 2001. "A ray theory approach to investigate the influence of flow velocity profiles on transit times in ultrasonic flow meters for gas and liquid".
  • Frøysa, Kjell-Eivind; Lunde, Per. 2001. "A ray theory approach to investigate the influence of flow velocity profiles on transit times in ultrasonic flow meters for gas and liquid".
  • Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne. 2000. "Finite element modeling of piezoceramic disks including radiation into a fluid medium".
  • Lunde, Per; Frøysa, Kjell-Eivind; Vestrheim, Magne. 2000. "Challenges for improved accuracy and traceability in ultrasonic fiscal flow metering".
  • Lunde, Per; Frøysa, Kjell-Eivind; Vestrheim, Magne. 2000. "Challenges for improved accuracy and traceability in ultrasonic fiscal flow metering of natural gas".
  • Furset, Hilde; Lunde, Per; Vestrheim, Magne; Frøysa, Kjell-Eivind. 1999. “Investigation of acoustic properties in wet gas for ultrasonic flowmetering”.
  • Baker, Andrew C.; Lunde, Per. 1999. “Effects of deposits on the performance of ultrasonic gas transducers”.
  • Frøysa, Kjell-Eivind; Lunde, Per. 1999. “Comparison of simulation models for ultrasonic propagation in wet gas”.
  • Lunde, Per; Frøysa, Kjell-Eivind; Fossdal, Jon B.; Heistad, Tom. 1999. "Functional enhancements within ultrasonic gas flow measurement".
  • Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne. 1999. "FE simulations of piezoceramic disks with a front layer of varying thickness".
  • Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne; Bjørndal, Erlend. 1998. “Piezoelectric disks with a front layer. Comparisons of FEM with experimental data”.
  • Lunde, Per; Frøysa, Kjell-Eivind. 1997. "Influence of piezoelectric transducer response on transit time determination using cross-correlation of chirp signals".
  • Kocbach, Jan M.; Lunde, Per; Vestrheim, Magne. 1997. "FEM analysis of piezoelectric disks - Method and testing".
  • Frøysa, Kjell-Eivind; Lunde, Per; Sakariassen, Reidar; Grendstad, Jens; Norheim, Rune. 1996. "Operation of multipath ultrasonic gas flow meters in noisy environments".
  • Lunde, Per. 1995. "Radial modes in thick, circular, isotropic and piezoceramic disks".
  • Lunde, Per; Vestrheim, Magne. 1995. "Modelling of loss effects in piezoceramic materials, and adaptation to measurements on radial and thickness modes in thin disks".
  • Lunde, Per. 1994. "On the modelling of causal wave propagation in viscoelastic solids".
  • Lunde, Per; Vestrheim, Magne. 1994. "Comparison of models for radial and thickness modes in piezoceramic disks".
  • Lunde, Per. 1993. "On the modelling of wave propagation in piezoelectric ceramic transducers".
  • Lunde, Per; Helle, Hans B.; Pajchel, J. 1992. "Comparison of full-wave and ray-tracing synthetic seismograms with emphasis on thin-layer resolution".
  • Lunde, Per; Helle, Hans B.; Pajchel, Jan. 1992. "A comparison of full-wave and ray-tracing seismograms with emphasis on thin-layer resolution".
  • Hanyga, Andrzej; Helle, Hans B.; Lunde, Per; Pajchel, Jan; Riste, P.; Holberg, Olav. 1991. "Seismic wave simulation in exploration and production".
  • Lunde, Per. 1991. "Interference effects in sound fields transmitted at fluid-fluid and fluid-solid interfaces".
  • Lunde, Per; Vestrheim, Magne; Bø, Reidar. 1990. "Aspects of transducer modelling".
  • Lunde, Per; Vestrheim, Magne; Lygre, Asle. 1989. "Ultrasonic pulse propagation in stratified multiphase media".
  • Lunde, Per; Vestrheim, Magne. 1989. "The interaction of seismic waves with shallow gas structures".
  • Vestrheim, Magne; Lunde, Per. 1989. "Pulse generation using a parametric source".
  • Lunde, Per. 1988. "Årsaker til heliumtaleforvrenging".
  • Vestrheim, Magne; Lunde, Per. 1988. "Signalbehandling i parametriske antenner".
  • Vestrheim, Magne; Lunde, Per. 1988. "Parametrisk lydkilde. Optimalisering".
  • Lygre, Asle; Vestrheim, Magne; Lunde, Per; Berge, Viktor. 1988. "Numerical simulation of ultrasonic flowmeters".
  • Vestrheim, Magne; Lunde, Per; Meldahl, Paul. 1988. "High resolution shallow seismic surveying using parametric acoustic source technology".
  • Lunde, Per; Vestrheim, Magne. 1988. "Full wave simulation of multilayer reflection coefficients in shallow seismics".
  • Vestrheim, Magne; Lunde, Per. 1987. "Utvikling av akustiske transdusere for gass-strømmåling".
  • Berge, Viktor; Lygre, Asle; Lunde, Per; Vestrheim, Magne. 1987. "Simuleringsverktøy for ultralyd væske og gasstrømningsmåling".
  • Vestrheim, Magne; Lunde, Per. 1987. "Simulering av full-bølge lydforplantning i marin seismikk".
  • Lygre, Asle; Vestrheim, Magne; Lunde, Per; Berge, Viktor. 1987. "Numerical simulation of ultrasonic flowmeters".
  • Lunde, Per. 1987. "Modelling of acoustic transducers".
  • Lunde, Per; Meldahl, Paul; Vestrheim, Magne. 1987. "Full wave elastic modelling for seismic detection of shallow gas".
  • Lunde, Per; Vestrheim, Magne. 1987. "Full bølgje FFP simulering for seismisk gasslommedeteksjon".
  • Lunde, Per. 1987. "FFP-modelling of seismic / elastic waves in horizontally stratified geologies".
  • Lunde, Per; Vestrheim, Magne. 1986. "Tredimensjonal FFP modellering av elastiske bølgjer i horisontalt stratifiserte media".
  • Lunde, Per. 1986. "The influence of diving masks on the formant spectrum of normal speech and helium speech".
  • Lunde, Per. 1985. "Acoustic transmission line analysis of formants in hyperbaric helium speech".
  • Lunde, Per. 1984. "Unscrambling of speech in a hyperbaric helium oxygen atmosphere".
  • Lunde, Per. 1984. "Formantanalyse av hyperbar heliumtale".
  • Lunde, Per; Dalland, Kjell Inge. 1984. "Det matematiske og fysiske grunnlaget for datamaskinell taleprosessering".
Other product
  • Kippersund, Remi André; Husebø, Magne; Lunde, Per; Frøysa, Kjell-Eivind; Thomas, Peter James; Lohne, Kjetil Daae; Hellevang, Jon Oddvar. 2019. "Sensor apparatus”, US patent No. US 10,317,262 B2; filed Dec. 29, 2014, granted 2019.06.11. 35 p.
  • Frøysa, Kjell-Eivind; Kippersund, Remi andré; Lunde, Per. 2012. "Stømningsmåleapparat", Norwegian Patent No. 331687, filed 2009.12.22, public available 2011.06.24, granted 2012.02.20. 43 p. .
  • Kippersund, Remi andré; Frøysa, Kjell-Eivind; Lunde, Per. 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. .
  • Kippersund, Remi andré; Frøysa, Kjell-Eivind; Lunde, Per. 2012. "Flow measuring apparatus", US patent No. US 8,141,434 B2, filed 2010.05.07, granted 2012.03.27. 21 p.
Academic anthology/Conference proceedings
  • Lunde, Per; Frøysa, Kjell-Eivind; Vestrheim, Magne. 2000. "GERG project on ultrasonic gas flow meters, Phase II. GERG Technical Monograph TM11. Groupe Européen de Recherches Gazières". VDI Verlag.
Academic monograph
  • Lunde, Per; Frøysa, Kjell-Eivind. 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).
Non-fiction book
  • Dahl, Eivind O.; Frøysa, Kjell-Eivind; Lunde, Per. 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 .
Doctoral dissertation
  • Sæther, Mathias. 2018. Elastic wave velocities and attenuation under methane hydrate growth in Bentheim sandstone - Measurements and modelling.
  • Storheim, Espen. 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 .
  • Eldevik, Simen. 2014. Measurement of non-linear acoustoelastic effect in steel using acoustic resonance (PhD thesis).
  • Aanes, Magne. 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).
  • Norli, Petter. 2007. "Sound velocity cell for gas characterization" (PhD thesis).
  • Pedersen, Audun. 2006. "Effects of nonlinear sound propagation in fisheries research" (PhD thesis).
  • Kocbach, Jan Martin. 2000. "Finite element modelling of ultrasonic piezoelectric transducers. Influence of geometry and material parameters on vibration response functions and radiated field" (Dr. Scient. thesis).
  • Lunde, Per. 1987. Analysis and unscrambling of hyperbaric helium speech.
  • Lunde, Per. 1986. "Analysis and unscrambling of hyperbaric helium speech. Part I and II" (Dr. Philos. thesis).
Abstract
  • Hjertaas, Johannes Just; Fosså, Henrik; Dybdahl, Grete Lunestad; Grüner, Renate; Lunde, Per; Matre, Knut. 2011. Accuracy of real-time single and multi beat 3D speckle tracking echocardiography in vitro. European Heart Journal-Cardiovascular Imaging. ii5-ii6.
  • Heggelund, Geir; Rasmussen, knut; Lunde, Per; Løchen, Maja-Lisa; Njølstad, Inger; Mathiesen, Ellisiv B.; Schirmer, Henrik. 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
  • Eldevik, Simen; Prieur, Fabrice Jean Gabriel; Lunde, Per. 2013. Measuring stress-state of gas pipelines (Poster presentation).
  • Storheim, Espen; Lunde, Per; Vestrheim, Magne. 2011. Diffraction correction for precision measurements of sound velocity in gas. Use of an alternative method for non-uniform piezoelectric transmitting transducer vibration (Poster).
  • Pedersen, Audun; Vestrheim, Magne; Lunde, Per. 2005. Ikkelineær lydforplantning ved bruk av ekkolodd i firskeriforvaltning.
  • Pedersen, Audun; Vestrheim, Magne; Lunde, Per. 2005. Consequences of non-linear sound propagation on target strength measurements - preliminary studies.
  • Bjelland, Cato; Lunde, Per; Kippersund, Remi andré. 2005. "Making downhole sensors available at high temperatures".
  • Norli, Petter; Lunde, Per; Vestrheim, Magne. 2005. "Investigation of precision sound velocity measurement methods as reference for ultrasonic gas flow meters".
  • Frøysa, Kjell-Eivind; Lunde, Per. 2005. "Integration methods in ultrasonic flow meters for gas and liquid".
Article in business/trade/industry journal
  • Lunde, Per. 2010. Fiskalmåling av olje og gass; - Utfordringer og muligheter med ultralydteknologi. NFOGM-nytt (Norwegian Society of Oil and Gas Measurement). 4 pages.

More information in national current research information system (CRIStin)

Research groups