Measuring and testing – Fluid pressure gauge – Vibration type
Patent
1987-04-17
1991-04-02
Raevis, Robert
Measuring and testing
Fluid pressure gauge
Vibration type
G01L 1100
Patent
active
050038257
ABSTRACT:
This invention discloses a differential or absolute pressure sensing apparatus that measures pressure exerted on a mechanical pressure sensing element in digitized electrical signals, which comprises two pressure receiving compartments separated from one another by a diaphragm or disc secured to two tension wires extending therefrom in two opposite directions and anchored at two extremities thereof, wherein electromagnetic vibrators intermittently induce vibration of the tension wires and vibration detectors measure the natural frequencies of vibrations of the two tension wires. The difference in pressures on two sides of the diaphragm or disc is proportional to the difference in the square of the natural frequencies of the two tension wires and, consequently, the differential pressure across the diaphragm or disc is obtained by measuring the natural frequencies of vibrations of the two tension wires. When one side of the diaphragm or disc is evacuated, the absolute pressure is measured.
REFERENCES:
patent: 2447817 (1948-08-01), Rieber
patent: 2959965 (1960-11-01), Holmes
patent: 2969677 (1961-01-01), Lewis
patent: 3019641 (1962-02-01), Shapiro
patent: 3079800 (1963-03-01), Hoar
patent: 3478594 (1969-11-01), Love
patent: 3721127 (1973-03-01), Garcea
patent: 4255973 (1981-03-01), Karplus
patent: 4343180 (1982-08-01), Herden et al.
patent: 4476725 (1984-10-01), Chorel et al.
patent: 4667097 (1987-05-01), Fasching et al.
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