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US 2015/0020599 A1Published application
Optical pressure sensor
AssigneeOxsensis Limited
InventorsRalf-Dieter Pechstedt, Fabrice F.M. Maillaud
Life of this patent
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Abstract
An optical pressure sensor is disclosed having a pressure sensing optical cavity. A temperature sensing optical cavity at the sensor head is used by an interrogator to correct a pressure signal for effects of temperature. The optical cavities may be, for example, Fabry Perot cavities in the sensor head.
Claims28
An optical pressure sensor comprising:
- a sensor head comprising a pressure sensing optical cavity and at least one temperature sensing optical cavity;
- and
- an interrogator optically coupled to the sensor head, and arranged to generate at least one signal representing pressure at the sensor head responsive to the pressure sensing optical cavity, the at least one signal representing pressure being temperature corrected by the interrogator responsive to the at least one temperature sensing optical cavity.
A method of operating an optical pressure sensor comprising a sensor head having a pressure sensing optical cavity and at least one temperature sensing optical cavity, the method comprising acts of:
- optically detecting the pressure sensing cavity and the at least one temperature sensing cavity;
- and
- generating at least one signal representing pressure at the sensor head responsive to the detection of the pressure sensing optical cavity, the act of generating comprising temperature correcting the at least one signal representing pressure responsive to detection of the at least one temperature sensing optical cavity.
Dependencies are inferred from the claim text.