Processing echoes in ultrasonic liquid gauging systems
US5856953A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 27, 1996 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | Nov 27, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/908
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method for processing echoes received in an ultrasonic liquid gauging apparatus includes the steps of transmitting at time t.sub.1 ultrasonic energy from an ultrasonic transducer toward a fixed target and a liquid surface; producing a transmission pulse corresponding to the time t.sub.1 ; receiving during a predetermined cycle interval a number (i) of ultrasonic echoes after t.sub.1 and converting each echo into a corresponding echo pulse having an associated time of arrival t.sub.i+1 ; and calculating the liquid level based on an averaged time of arrival of the second echo relative to t.sub.1 when it is known that the liquid surface is low.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.