Method and acoustic device for measuring surface movements

US11249187B2 · kind B2 · utility

Assignees

• CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE · FR
• ECOLE SUPERIEURE DE PHYSIQUE ET DE CHIMIE INDUSTRIELLES DE LA VILLE DE PARIS · FR
• Sorbonne Universite · FR
• INSERM (INSTITUT NATIONAL DE LA SANTÉ ET DE LA RECHERCHE MÉDICALE) · FR
• UNIVERSITÉ PARIS DIDEROT—PARIS 7 · FR

Inventors

• Ros Kiri Ing · Paris, FR
• Nathan Jeger-Madiot · Paris, FR
• Mathias Fink · Meudon, FR
• Thomas Similowski · Issy-les-Moulineaux, FR

Key dates

• Filing date: Jul 10, 2017
• Grant date: Feb 15, 2022
• Expiry date: Mar 2, 2039

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B8/4477
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method for detecting movements of a plurality of points (P) of a surface (21), comprising a measuring step during which an incident ultrasonic wave is emitted into the air towards the surface and an ultrasonic wave reflected into the air by the surface (21) is detected. During the measuring step, each measuring point is illuminated by the incident ultrasonic wave at a multiplicity of angles of incidence, and the reflected ultrasonic wave is detected by a network of receiving transducers (3) comprising a plurality of ultrasonic receiving transducers (3a). The movements of the surface are determined at a measuring point by determining a delay and/or a phase shift between two beam-forming signals for said measuring point.