Systems and methods for measuring temperature
AssigneeGeneral Electric Company
InventorsAaron Jay Knobloch, Adam Halverson
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Abstract
Systems and methods disclosed herein use a multi-color pyrometer configured to determine a first temperature in a high temperature range and a single-color pyrometer configured to determine second temperature in a low temperature range. The system uses information gained from determination of the first temperature in the high temperature range to facilitate later determining the second temperature in the low temperature range. The first temperature in the high temperature range and the second temperature in the low temperature range are used to monitor and control different engine operations that occur at different times.
Claims20
A thermal measurement system comprising:
- a first detector configured to measure a first measurement of irradiance associated with a first wavelength;
- a second detector configured to measure a second measurement of irradiance associated with a second wavelength;
- a third detector configured to measure a third measurement of irradiance associated with a third wavelength;
- and
- a computing device configured to:
- determine, based on a ratio of the first measurement of irradiance and the second measurement of irradiance, a high target temperature in a first temperature range;
- determine a value of a correction factor based on the high target temperature and one of the first measurement of irradiance and the second measurement of irradiance;
- and
- determine, based on the value of the correction factor and the third measurement of irradiance, a low target temperature in a second temperature range, wherein the second temperature range is below the first temperature range.
A method, comprising:
- determining, by a thermal measurement system, a high target temperature of an object in a hot gas path of an engine, wherein the high target temperature is in a first temperature range, wherein the high target temperature is determined based on:
- a first measurement of irradiance at a first wavelength with a first detector;
- and
- a second measurement of irradiance at a second wavelength with a second detector;
- determining, by the thermal measurement system, a value for a correction factor based on the high target temperature and at least one of the first measurement of irradiance at the first wavelength and the second measurement of irradiance at the second wavelength;
- and
- determining, by the thermal measurement system, a low target temperature of the object in the hot gas path of the engine, wherein the low target temperature is in a second temperature range, wherein the low target temperature is determined based on:
- a third measurement of irradiance at a third wavelength with a third detector;
- and
- the value of the correction factor;
- and
- wherein the second temperature range is below the first temperature range.
A non-transitory computer-readable medium, comprising instruction that, when executed by a processor, cause the processor to:
- determine a high target temperature of an object in a hot gas path of an engine, wherein the high target temperature is in a first temperature range, wherein the high target temperature is determined based on:
- a first measurement of irradiance at a first wavelength with a first detector;
- and
- a second measurement of irradiance at a second wavelength with a second detector;
- determine a value for a correction factor based on the high target temperature and at least one of the first measurement of irradiance at the first wavelength and the second measurement of irradiance at the second wavelength;
- and
- determine a low target temperature of the object in the hot gas path of the engine, wherein the low target temperature is in a second temperature range, wherein the low target temperature is determined based on:
- a third measurement of irradiance at a third wavelength with a third detector;
- and
- the value of the correction factor;
- and
- wherein the second temperature range is below the first temperature range.
Dependencies are inferred from the claim text.