Process and device for ultrasonic detection of gas bubbles in a liquid metal
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United States of America Patent
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Mar 15, 1988
Grant Date -
N/A
app pub date -
Sep 30, 1986
filing date -
Sep 30, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ultrasonic beam is sent into liquid metal from a transmitting point (3) outside the enclosure (1) containing the liquid metal, the beam is detected outside the enclosure (1) after it has passed through the liquid metal, the amplitude of the ultrasonic waves detected is compared with the amplitude of the transmitted ultrasonic waves and the attenuation of the ultrasounds produced by the passage through the liquid metal which may contain gas bubbles (2) is determined. The device comprises a wave guide (4) metallurgically connected to the enclosure (1). A processing unit (10) connected to the ultrasonic transducers (3, 6) measures the attenuation.
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