Method and system for measurement of liquid level in a tank

Details Method and system for measurement of liquid level in a tank Method and system for measurement of liquid level in a tank

G - Physics

01

F

73/129, 354/30

G01F 23/14 (2006.01) G01F 23/16 (2006.01)

Patent

CA 1254400

Abstract The computer based remote tank telemetry system uses a method for updating a prior collected average level of substance in a tank. It continuously deter- mines values of differential pressure within the tank and in accordance with the values of differential pres- sure determines the instantaneous level of substance within the tank. A prior collected average level is stored and is compared with each of the instantaneous values of level thus obtained. On the basis of this comparison a relative weighing factor is determined which weighs the relative contribution of the collected and instantaneous values in determining a new collected value. The new collected average is compared against a predetermined setpoint to determine whether the level of substance in the tank is too low. The results of this comparison can be displayed locally, and using a modem, communicated to a remote display. The method for deter- mining the relative weighing factor has three tiers. The selection of the required tier is done in accordance with the levels compared.

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