Method and system for measurement of liquid level in a tank
US4736329A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1986 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Jun 16, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 determines values of differential pressure within the tank and in accordance with the values of differential pressure 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 determining the relative weighing factor has three tiers. The selection of the required tier is done in accordance with the levels compared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.