A method of monitoring for combustion anomalies in a gas turbomachine includes sensing an exhaust gas temperature at each of a plurality of temperature sensors arranged in an exhaust system of the gas turbomachine, comparing the exhaust gas temperature at each of the plurality of temperature sensors with a mean exhaust gas temperature, determining whether the exhaust gas temperature at one or more of the plurality of temperature sensors deviates from the mean exhaust temperature by a predetermined threshold value, and identifying an instantaneous combustion anomaly at one or more of the temperature sensors sensing a temperature deviating from the mean exhaust temperature by more than the predetermined threshold value.

In some examples, a temperature distribution sensor may include a laser source to emit a laser beam that is tunable over a wavelength range. The wavelength range may be less than a Raman bandwidth in a device under test (DUT), or of-the-order-of the Raman bandwidth in the DUT. A pulsed source may apply a pulse drive signal to the laser beam or to a modulator to modulate the laser beam that is to be injected into the DUT. A bandpass filter may be operatively disposed between the laser source and the DUT, and may be configured to an anti-Stokes wavelength that is narrower than the Raman bandwidth. A photodiode may be operatively disposed between the bandpass filter and the DUT to acquire, from the DUT, anti-Stokes optical time-domain reflectometer traces for two preset wavelengths of the laser beam to determine a temperature distribution for the DUT.

In some examples, a temperature distribution sensor may include a laser source to emit a laser beam that is tunable over a wavelength range. The wavelength range may be less than a Raman bandwidth in a device under test (DUT), or of-the-order-of the Raman bandwidth in the DUT. A pulsed source may apply a pulse drive signal to the laser beam or to a modulator to modulate the laser beam that is to be injected into the DUT. A bandpass filter may be operatively disposed between the laser source and the DUT, and may be configured to an anti-Stokes wavelength that is narrower than the Raman bandwidth. A photodiode may be operatively disposed between the bandpass filter and the DUT to acquire, from the DUT, anti-Stokes optical time-domain reflectometer traces for two preset wavelengths of the laser beam to determine a temperature distribution for the DUT.

An optimized thermocouple system and a method of optimizing a thermocouple system having a plurality of thermocouple probes and a junction box is provided and includes examining the thermocouple system to identify a first thermocouple probe of the plurality of thermocouple probes, wherein the first thermocouple probe includes a first positive leg and a first negative leg and is located electrically farthest from the junction box. The method includes calculating a first loop resistance between the first thermocouple probe and the junction box and configuring a second thermocouple probe of the plurality of thermocouple probes having a second positive leg, a second negative leg and a second loop resistance such that the second loop resistance is substantially equal to the first loop resistance.

The invention relates to an apparatus for measuring the human body temperature. It comprises of an infrared temperature sensor for performing temperature sampling on a plurality M×N of sampling points, M≧3, N≧3. The temperatures of the sampling points with temperatures within the effective temperature range of the human body are averaged to obtain the body temperature of the human body. By collecting the temperatures of a plurality of sampling points of the measured object, the invention effectively avoids the errors that measurement of single point may produce (as may be caused by factors such as the environment); by screening for temperatures within the effective temperature range of the human body, the invention effectively avoids errors or interference produced by factors such as clothing or the environment. The improved accuracy and real-time measurement of body temperature bring convenience to people's lives.

Methods of determining a desired sensor probe location in a closed loop emissions control (CLEC) system of a gas turbine engine are provided. One method includes determining, at different locations, a plurality of temperature contour profiles for exhaust flowing through an exhaust duct, selecting an emissions component entrained in the exhaust to be measured, and determining a desired sensor probe installation location based on the emissions component to be measured and based on the plurality of temperature contour profiles.

Methods of determining a desired sensor probe location in a closed loop emissions control (CLEC) system of a gas turbine engine are provided. One method includes determining, at different locations, a plurality of temperature contour profiles for exhaust flowing through an exhaust duct, selecting an emissions component entrained in the exhaust to be measured, and determining a desired sensor probe installation location based on the emissions component to be measured and based on the plurality of temperature contour profiles.

A device that measures a temperature of a heat plate for heating a target substrate mounted thereon, includes: a temperature measurement substrate including a substrate body and temperature sensors installed in the substrate body; a memory part to store correction parameters over a plurality of time zones after the temperature measurement substrate is mounted on the heat plate; and a data processing part configured to acquire time transition data of a temperature by correcting respective temperature detection values sampled at predetermined time intervals after the temperature measurement substrate is mounted on the heat plate, using the correction parameters stored in the memory part in a corresponding relationship with the temperature sensors and the time zones. The correction parameters are obtained in advance based on a standard temperature transition data acquired in advance using the temperature sensors and a time transition data acquired by each of the temperature sensors.

A device that measures a temperature of a heat plate for heating a target substrate mounted thereon, includes: a temperature measurement substrate including a substrate body and temperature sensors installed in the substrate body; a memory part to store correction parameters over a plurality of time zones after the temperature measurement substrate is mounted on the heat plate; and a data processing part configured to acquire time transition data of a temperature by correcting respective temperature detection values sampled at predetermined time intervals after the temperature measurement substrate is mounted on the heat plate, using the correction parameters stored in the memory part in a corresponding relationship with the temperature sensors and the time zones. The correction parameters are obtained in advance based on a standard temperature transition data acquired in advance using the temperature sensors and a time transition data acquired by each of the temperature sensors.

The present invention pertains to a device for measuring a temperature distribution, which can measure a temperature distribution without contacting a minor sample having a three-dimensional structure. More particularly, the device for measuring the temperature distribution can measure a three-dimensional temperature distribution for a sample, wherein the temperature distribution in a depth direction (direction z) of the sample is measured by a thermo-reflectance technique using a chromatic dispersion lens, a diffraction spectrometer and an optical detection array; and the temperature distribution in parallel directions (direction x-y axes) of the sample is measured by the thermo-reflectance technique using a biaxial scanning mirror.