G - Physics – 01 – F
Patent
G - Physics
01
F
349/38
G01F 23/28 (2006.01) G01F 23/296 (2006.01) G01N 29/02 (2006.01) G01N 29/24 (2006.01) G21C 17/035 (2006.01) G21C 17/038 (2006.01)
Patent
CA 1323684
Abstract of the Disclosure: A method for electromagnetic ultrasonic conversion includes exerting dynamic-mechanical forces upon particles of an electrically conductive material of a test sample by superim- posing quasi-static magnetic and electromagnetic high-fre- quency fields of a transmission converter for generating ultrasonic vibrations when transmitting. Electrical fields are induced by waves arriving in the test sample resulting in vibrations of the particles of material inductively affecting the fields of a receiver converter when receiving. The excitation of the vibrations when transmitting and the induction of electrical fields when receiving are effected by Lorentz and magnetic forces as well as by magnetostriction forces if the test sample is ferromagnetic. Fill level and bubble formation are monitored in enclosures in the form of containers and pipelines for liquid, by coupling a transmis- sion converter and a receiver converter to an enclosure wall. Ultrasonic vibrations are generated in the wall inducing echo signals differing by amplitude and/or phase in the receiver converter, depending on whether the interior of the enclosure contains liquid, liquid containing steam or gas bubbles, or only a fluid in the form of vapor or gas, while reflecting the signals on the inner boundary surface of the wall or striking a reflector after entering the liquid and traveling a distance therein, and reflecting the signals back from the reflector through the fluid and through the wall to the receiver converter.
578105
Huebschen Gerhard
Kroening Michael
Loehr Ernst
Repplinger Wilhelm
Salzburger Hans-Juergen
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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