Measuring and testing – Liquid level or depth gauge
Patent
1984-03-26
1987-07-14
Frankfort, Charles
Measuring and testing
Liquid level or depth gauge
73599, 340621, G01F 2322
Patent
active
046794301
ABSTRACT:
A sensor for detecting an interface of a liquid in a container comprises a transmitter and a receiver of ultrasonic waves, each situated outside the container, and coupled to the wall of the container by a strip waveguide. The transmitter is arranged to cause surface acoustic waves to propagate through a portion of the wall, and the receiver is arranged to detect waves derived from the transmitter. When the liquid is adjacent to the portion of the wall, mode conversion of the surface acoustic waves in the wall of the vessel into compression waves in the liquid causes a change in the energy of waves reaching the receiver.
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patent: 3520186 (1970-07-01), Adams et al.
patent: 4118983 (1978-10-01), Brazhnikov
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patent: 4320659 (1982-03-01), Lynnworth et al.
Deighton Michael O.
Gillespie Arthur B.
Pike Roger B.
Scott-Kestin Colin B.
Watkins Roger D.
Frankfort Charles
Hinds William R.
Scanlon Patrick R.
United Kingdom Atomic Energy Authority
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