Measuring and testing – Liquid level or depth gauge – With other measuring device
Patent
1997-11-25
2000-05-23
Williams, Hezron
Measuring and testing
Liquid level or depth gauge
With other measuring device
73299, G01F 2300
Patent
active
060653353
ABSTRACT:
The invention is directed to a method for detecting a fill level of a tank system utilizing a pressure source, a bridge divider arrangement and a pressure measuring device. The pressure source is adapted to generate a change of pressure in the tank system. The pressure divider arrangement has a reference measuring unit which can be charged with pressure by the pressure source. The reference measuring unit further includes at least one flow resistor of a predetermined size in at least one reference flow branch. For measuring the tightness, the pressure measuring device simultaneously detects the difference of the pressure in the tank system and of the pressure in the reference measuring unit. In the method, the time-dependent trace of the difference pressure during at least one of a pressure build-up operation and a pressure decay operation is continuously detected. A conclusion is then drawn as to the fill level from the time-dependent trace.
REFERENCES:
patent: 5379638 (1995-01-01), Denz et al.
patent: 5898103 (1999-04-01), Denz et al.
Blumenstock Andreas
Denz Helmut
Mallebrein Georg
Cygan Michael
Ottesen Walter
Robert & Bosch GmbH
Williams Hezron
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