METHODS AND INSTRUMENTATION FOR ESTIMATION OF WAVE PROPAGATION AND SCATTERING PARAMETERS

Estimation and imaging of linear and nonlinear propagation and scattering parameters in a material object where the material parameters for wave propagation and scattering has a nonlinear dependence on the wave field amplitude. The methods transmit at least two pulse complexes composed of co-propaga...

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Main Authors SOLBERG, Stian, KWAM, Johannes, ANGELSEN, Bjorn
Format Patent
LanguageEnglish
French
Published 30.12.2021
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Abstract Estimation and imaging of linear and nonlinear propagation and scattering parameters in a material object where the material parameters for wave propagation and scattering has a nonlinear dependence on the wave field amplitude. The methods transmit at least two pulse complexes composed of co-propagating high frequency (HF) and low frequency (LF) pulses along at least one LF and HF transmit beam axis, where said HF pulse propagates close to the crest or trough of the LF pulse along at least one HF transmit beam, and where one of the amplitude and polarity of the LF pulse varies between at least two transmitted pulse complexes. At least one HF receive beam crosses the HF transmit beam at an angle, to provide at least two HF cross-beam receive signals from at least two transmitted pulse complexes with different LF pulses. L'invention se rapporte à l'estimation et l'imagerie de paramètres de propagation et de diffusion linéaires et non linéaires dans un objet en matériau dans lequel les paramètres de matériau de propagation et de diffusion d'onde ont une dépendance non linéaire à l'amplitude du champ d'onde. Les procédés consistent à transmettre au moins deux complexes d'impulsions composés d'impulsions haute fréquence (HF) et basse fréquence (LF) de propagation conjointe le long d'au moins un axe de faisceau de transmission LF et HF, ladite impulsion HF se propageant à proximité de la crête ou du creux de l'impulsion LF le long d'au moins un faisceau d'émission HF, et l'amplitude ou la polarité de l'impulsion LF variant entre au moins deux complexes d'impulsions transmis. Au moins un faisceau de réception HF coupe le faisceau de transmission HF à un certain angle, pour fournir au moins deux signaux de réception de faisceaux HF se coupant à partir d'au moins deux complexes d'impulsions transmis avec des impulsions LF différentes.
AbstractList Estimation and imaging of linear and nonlinear propagation and scattering parameters in a material object where the material parameters for wave propagation and scattering has a nonlinear dependence on the wave field amplitude. The methods transmit at least two pulse complexes composed of co-propagating high frequency (HF) and low frequency (LF) pulses along at least one LF and HF transmit beam axis, where said HF pulse propagates close to the crest or trough of the LF pulse along at least one HF transmit beam, and where one of the amplitude and polarity of the LF pulse varies between at least two transmitted pulse complexes. At least one HF receive beam crosses the HF transmit beam at an angle, to provide at least two HF cross-beam receive signals from at least two transmitted pulse complexes with different LF pulses. L'invention se rapporte à l'estimation et l'imagerie de paramètres de propagation et de diffusion linéaires et non linéaires dans un objet en matériau dans lequel les paramètres de matériau de propagation et de diffusion d'onde ont une dépendance non linéaire à l'amplitude du champ d'onde. Les procédés consistent à transmettre au moins deux complexes d'impulsions composés d'impulsions haute fréquence (HF) et basse fréquence (LF) de propagation conjointe le long d'au moins un axe de faisceau de transmission LF et HF, ladite impulsion HF se propageant à proximité de la crête ou du creux de l'impulsion LF le long d'au moins un faisceau d'émission HF, et l'amplitude ou la polarité de l'impulsion LF variant entre au moins deux complexes d'impulsions transmis. Au moins un faisceau de réception HF coupe le faisceau de transmission HF à un certain angle, pour fournir au moins deux signaux de réception de faisceaux HF se coupant à partir d'au moins deux complexes d'impulsions transmis avec des impulsions LF différentes.
Author ANGELSEN, Bjorn
SOLBERG, Stian
KWAM, Johannes
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Snippet Estimation and imaging of linear and nonlinear propagation and scattering parameters in a material object where the material parameters for wave propagation...
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SubjectTerms ANALOGOUS ARRANGEMENTS USING OTHER WAVES
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
MEASURING
MEDICAL OR VETERINARY SCIENCE
PHYSICS
RADIO DIRECTION-FINDING
RADIO NAVIGATION
SURGERY
TESTING
Title METHODS AND INSTRUMENTATION FOR ESTIMATION OF WAVE PROPAGATION AND SCATTERING PARAMETERS
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