Digital pressure transducer for use at high temperatures

Details Digital pressure transducer for use at high temperatures Digital pressure transducer for use at high temperatures

1979-11-07

1981-03-17

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Vibration type

73728, 73DIG1, G01L 900

Patent

active

042559731

ABSTRACT:
A digital pressure sensor for measuring fluid pressures at relatively high temperatures includes an electrically conducting fiber coupled to the fluid by a force disc that causes tension in the fiber to be a function of fluid pressure. The tension causes changes in the mechanical resonant frequency of the fiber, which is caused to vibrate in a magnetic field to produce an electrical signal from a positive-feedback amplifier at the resonant frequency. A count of this frequency provides a measure of the fluid pressure.

REFERENCES:
patent: 2447817 (1948-08-01), Rieber
patent: 2959965 (1960-11-01), Holmes
patent: 3067615 (1962-12-01), Holmes
patent: 3079800 (1963-03-01), Hoar
patent: 4165651 (1979-08-01), Olsen

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