G - Physics – 01 – F
Patent
G - Physics
01
F
349/38
G01F 23/28 (2006.01) G01F 23/296 (2006.01) G01S 15/02 (2006.01)
Patent
CA 1318389
NONINTRUSIVE ACOUSTIC LIQUID LEVEL SENSOR ABSTRACT OF THE DISCLOSURE A non-intrusive acoustic sensor system for detecting and displaying the location of the level of a liquid in a tank uses a piezoelectric transceiver mounted to a bottom exterior location on the tank. The transceiver is an element of a driving and signal processing circuit which also includes a readout device for displaying liquid level location in selected terms. The system circuitry includes a microprocessor programmed to enable the velocity of sound in a liquid in the tank to be determined by the system at the site of use from a single distance measurement descriptive of the usage situation. The system automatically selects and uses the transceiver acoustic emission frequency which is best for the tank and liquid combination of interest at any time. The system, in a dual- transceiver configuration described, determines and uses speed of sound in the liquid as it in fact exists at any time. The system also rejects echo signals which are determined to describe locations in the tank other than the liquid surface. A plurality of liquid levels can be defined at which control or alarm events are to occur.
584726
Christensen Edward L.
Olson Rodney Steven
Moore Technologies Inc.
Rogers & Scott
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