Patent
Ultrasonic liquid level monitoring system
TLDR
In this article, a tubular ultrasonic probe with a length in excess of the depth of liquid to be measured is used for vertical insertion into a tank for vertical measurement of liquid level.Abstract:
A liquid level measuring system having a tubular ultrasonic probe with a length in excess of the depth of liquid to be measured; for vertical insertion into a tank. A transducer inside the tube, at a first distance above the bottom end of probe body, responds transmits a sinusoidal acoustical pulse through the probe to the surface of the liquid. An echo returns from the surface of the liquid to the transducer and provides a sinusoidal echo signal. A receiver responds to the echo signal by providing a start signal corresponding to the transmitter signal crossing a predetermined amplitude in a predetermined direction and by providing a stop signal corresponding to a first selected echo signal crossing a second predetermined reference level in a predetermined direction. The speed of sound in the liquid is measured by measuring the echo time to a calibration rod in the tube at a known distance from the transducer. A timer measures the time between the start and stop signals and provides the time to a sequential controller. The depth of the liquid and the leak rate of the tank are calculated for display.read more
Citations
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Patent
Liquid container having liquid consumption detecting device
TL;DR: In this paper, a liquid container, comprising of a housing containing therein liquid, a liquid supply opening formed in the housing for withdrawing the liquid from the housing; a liquid sensor mounted on the housing, for detecting a level of liquid which is variable in accordance with a consumption of the liquid; and a first partition wall extending in an interior of the housing and defining the interior into at least two liquid accommodating chambers which communicate with each other.
Patent
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Patent
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TL;DR: A liquid detection device attached on a liquid container for detecting a liquid consumption status of the liquid contained in the liquid container, the device including a vibrating section symmetrical about a center thereof, and at least one electrode electrically connecting with said vibrating sections.
References
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Patent
Liquid storage tank contents gauge
Aeneas M. Rosie,Colin J. MacLeod +1 more
TL;DR: A liquid storage tank contents gauge comprises means providing an electrical signal corresponding to the vertical height of the liquid in a tank in the form of an ultrasonic transducer positioned at the base of the tank and emitting a pulse of acoustic energy vertically upwards and including timing means provided to time the interval between the emission of the pulse and the detection of the reflected pulse as mentioned in this paper.
Patent
Tank gauging system and methods
TL;DR: In this article, an ultrasonic transducer at a fixed distance above the bottom of the tank, a plurality of submerged reflectors vertically arranged at fixed distances above the transducers and a remote console, containing a computer, was used to activate and receive signals of ultrasonic reflections developed by transducers, which can be used for computing the height of the liquid (gasoline) level, the depth of the water, if any, the velocity of sound through the gasoline and through the liquid as a whole.
Patent
Liquid-level sensor
TL;DR: In this paper, a transducer is mounted on a pipe above the liquid for producing, in response to a trigger signal, an ultrasonic pulse which is transmitted toward and reflected to the transducers first from a calibration target in the pipe above liquid and then from the liquid so that the transducers produces echo pulses.
Patent
Ultrasonic transducer with reference reflector
TL;DR: An ultrasonic transducer for a system for determining liquid levels by echo ranging composed of a housing including a piezoelectric crystal mounted within the housing to transmit acoustic waves, an impedance matching medium mounted within a housing adjacent the crystal and including a window layer and a diaphragm layer, and a reference reflector assembly mounted to extend from adjacent said housing, which assembly includes a U-shaped member having two legs extending in slideable contact with the sidewall of the tube and further including a member connecting the two legs.
Patent
Water level measurement device
Cobia B. Shuler,Wesley E. Moore +1 more
TL;DR: In this article, the level of water was measured by a hollow, oblong structure with an open end extended into the water, signal sending and receiving means secured onto the structure, and an insert containing a hole secured within the structure.