Process temperature measurement using infrared detector
AssigneeRosemount Inc.
InventorJason Harold Rud
Life of this patent
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Abstract
A process variable transmitter for measuring a temperature in an industrial process includes an infrared detector arranged to receive infrared radiation from a component in the industrial process. A memory contains temperature characterization information which relates the infrared radiation received from the component with an internal temperature of the component. Measurement circuitry is configured to determine the internal temperature of the component based upon the received infrared radiation from the component and the temperature characterization information.
Claims15
A process variable transmitter for measuring a process temperature in an industrial process, comprising:
- an infrared detector arranged to receive infrared radiation from a process component in the industrial process;
- a memory containing temperature characterization information which relates the infrared radiation received from the process component with an internal temperature of the process component;
- a temperature sensor located internal to the process component;
- measurement circuitry configured to infer the internal temperature of the process component based upon the received infrared radiation from the surface of the process component and the temperature characterization information;
- and
- wherein the measurement circuitry operates in a characterization phase to generate the characterization information based upon a relationship between a temperature sensed by the temperature sensor and radiation received by the infrared detector.
A method for measuring a temperature of a process fluid in an industrial process, comprising:
- receiving infrared radiation with an infrared radiation detector from a process component in the industrial process which carries the process fluid;
- placing a temperature sensor internal to the process component and in contact with the process fluid;
- determining temperature characterization information based upon a temperature sensed by the temperature from the temperature sensor and radiation received by the infrared radiation detector;
- retrieving the temperature characterization information from a memory, wherein the temperature characterization information relates the received infrared radiation to temperature of the process fluid;
- applying the temperature characterization information to the received infrared radiation and responsively inferring temperature of the process fluid;
- and
- providing an output related to the temperature of the process fluid.
Dependencies are inferred from the claim text.