Electromagnetic resonator pressure sensor
First Claim
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1. A pressure sensor, said pressure sensor comprising:
- an electromagnetic resonator with a waveguide comprising a dielectric material having a dielectric permittivity that varies with temperature;
an excitation circuit configured to propagate an electromagnetic field through said waveguide;
a device for heating said resonator;
a device for detecting an electromagnetic resonant frequency of the resonator; and
a device for determining a pressure of a gas surrounding the sensor as a function of the detected electromagnetic resonant frequency.
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Abstract
The invention relates to a pressure sensor including an electromagnetic resonator with waveguide having a dielectric material with a dielectric permittivity that varies with temperature. There is an excitation circuit configured to propagate an electromagnetic field through the resonator and a device for heating the resonator. There is also a device for detecting the electromagnetic resonant frequency of the resonator and a device for determining the pressure of the gas surrounding the sensor as a function of the detected resonant frequency of the resonator.
5 Citations
15 Claims
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1. A pressure sensor, said pressure sensor comprising:
- an electromagnetic resonator with a waveguide comprising a dielectric material having a dielectric permittivity that varies with temperature;
an excitation circuit configured to propagate an electromagnetic field through said waveguide;
a device for heating said resonator;
a device for detecting an electromagnetic resonant frequency of the resonator; and
a device for determining a pressure of a gas surrounding the sensor as a function of the detected electromagnetic resonant frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- an electromagnetic resonator with a waveguide comprising a dielectric material having a dielectric permittivity that varies with temperature;
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15. A method for measuring a pressure of a gas, said method comprising:
- placing an electromagnetic resonator in thermal contact with the gas, the electromagnetic resonator including a waveguide comprising a dielectric material that has a dielectric permittivity that varies with temperature;
heating said resonator;
electromagnetically exciting an electromagnetic wave that propagate through said waveguide;
detecting an electromagnetic resonant frequency of the resonator that has propagated through said waveguide; and
determining the pressure of the gas as a function of the detected electromagnetic resonant frequency.
- placing an electromagnetic resonator in thermal contact with the gas, the electromagnetic resonator including a waveguide comprising a dielectric material that has a dielectric permittivity that varies with temperature;
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