Processing echoes in ultrasonic liquid gauging systems

Details Processing echoes in ultrasonic liquid gauging systems Processing echoes in ultrasonic liquid gauging systems

1996-11-27

1999-01-05

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367908, 73290V, G01F 23296, G01F 2328

Patent

active

058569537

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.

REFERENCES:
patent: 4210969 (1980-07-01), Massa
patent: 4470299 (1984-09-01), Soltz
patent: 5085077 (1992-02-01), Stapleton et al.
patent: 5226320 (1993-07-01), Dages et al.
patent: 5309763 (1994-05-01), Sinclair

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