Measuring and testing – Fluid pressure gauge – With pressure and/or temperature compensation
Patent
1991-07-29
1992-05-12
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
With pressure and/or temperature compensation
73718, 361283, G01L 912, G01L 1302, G01L 1904
Patent
active
051116987
ABSTRACT:
The differential pressure measuring apparatus comprises a single chamber differential pressure sensor having two resilient sensor diaphragms which enclose a volume filled with a fluid. In the single chamber differential pressure sensor two measuring capacitors are formed whose capacitances vary in opposite senses in response to the sensor differential pressure between the pressures acting on the two sensor diaphragms. The single chamber differential pressure sensor is connected to an adaptor comprising a volume filled with a fluid which is closed on the one hand by one of the two sensor diaphragms and on the other hand by an elastic adaptor diaphragm. An evaluation circuit calculates the sensor differential pressure from the capacitances of the measuring capacitors. The evaluation circuit comprises a first compensation arrangment which compensates the influences of the sensor temperature and of the sensor parameters on the calculated sensor differential pressure, and a second compensation arrangement which compensates the influences of the adaptor temperature and of the adaptor parameters on the sensor differential pressure corrected by the first compensation arrangement.
REFERENCES:
patent: 3646538 (1972-02-01), Frick
patent: 3715638 (1973-02-01), Polye
patent: 3783374 (1974-01-01), Eide et al.
patent: 4072057 (1978-02-01), Yasuhara et al.
patent: 4169389 (1979-10-01), Yasuhara et al.
patent: 4177496 (1979-12-01), Bell et al.
patent: 4398194 (1983-08-01), Johnston
patent: 4531415 (1985-07-01), Orlowski et al.
patent: 4572000 (1986-02-01), Koolman
patent: 4598381 (1986-07-01), Cucci
patent: 4680971 (1987-07-01), Kavli et al.
patent: 4735098 (1988-04-01), Kavli et al.
Banholzer Karlheinz
Gerst Peter
Jung Peter
Endress u. Hauser GmbH u. Co.
Woodiel Donald O.
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