EP 3490727 A1 20190605 - MULTI-ELEMENT, CAPACITIVE, ULTRASONIC, AIR-COUPLED TRANSDUCER
Title (en)
MULTI-ELEMENT, CAPACITIVE, ULTRASONIC, AIR-COUPLED TRANSDUCER
Title (de)
KAPAZITIVER LUFTGEKOPPELTER ULTRASCHALLWANDLER MIT MEHREREN ELEMENTEN
Title (fr)
TRANSDUCTEUR ULTRASONORE MULTIÉLÉMENTS CAPACITIF À COUPLAGE AIR
Publication
Application
Priority
- FR 1657305 A 20160728
- EP 2017068663 W 20170724
Abstract (en)
[origin: WO2018019778A1] The invention concerns a multi-element, capacitive, ultrasonic, air-coupled transducer (100) comprising: - a membrane (120) having an electrically conductive face; and - a plurality of electrically separate conductive elements, consisting of a central disc (111) and a plurality of rings (112) arranged concentrically with the central disc, the conductive elements each having a face arranged facing the membrane (120) and said faces of the conductive elements being of the same surface area; wherein the central disc (111) has a radius (R1) of between 10 mm and 15 mm and wherein the number of conductive elements is between 12 and 18.
IPC 8 full level
B06B 1/02 (2006.01)
CPC (source: EP US)
B06B 1/0292 (2013.01 - EP US); G01N 29/2406 (2013.01 - US)
Citation (search report)
See references of WO 2018019778A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2018019778 A1 20180201; EP 3490727 A1 20190605; FR 3054768 A1 20180202; FR 3054768 B1 20180810; US 2019160491 A1 20190530
DOCDB simple family (application)
EP 2017068663 W 20170724; EP 17749639 A 20170724; FR 1657305 A 20160728; US 201716320856 A 20170724