In this work, a novel approach is presented for measuring relative temperature variations inside the pixel array of a CMOS image sensor itself. This approach can give important information when compensation for dark (current) fixed pattern noise (FPN) is needed. The test image sensor consists of pixels and temperature sensors pixels (=Tixels). The size of the Tixels is 11 μm × 11 μm. Pixels and...

BACKGROUND AND OBJECTIVES Fluoroptic sensors are used to measure interstitial temperatures but their utility for monitoring laser interstitial thermal therapy (LITT) is unclear because these sensors exhibit a measurement artefact when exposed to the near-infrared (NIR) treatment light. This study investigates the cause of the artefact to determine whether fluoroptic sensors can provide reliable...

Multiplexed FBG temperature sensors are used to measure a temperature profile inside an irradiation channel of a low flux nuclear reactor. After 40 months, we show that the sensors still operate satisfactorily. The measured drift is lower than 3 ◦C.

Thermometry ................................................................................................................................................. 1 Applications .............................................................................................................................................. 2 Temperature metrology ............................................................

There are a number of gas ionization sensors using carbon nanotubes as cathode or anode. Unfortunately, their applications are greatly limited by their multi-valued sensitivity, one output value corresponding to several measured concentration values. Here we describe a triple-electrode structure featuring two electric fields with opposite directions, which enable us to overcome the multi-valued...

Optical microfiber-based temperature sensors have been proposed for many applications in a variety of industrial uses, including biomedical, geological, automotive, and defense applications. This increasing demand for these micrometric devices is attributed to their large dynamic range, high sensitivity, fast-response, compactness and robustness. Additionally, they can perform in-situ measureme...

The Space Dynamics Laboratory (SDL) has observed, over several years of work with various blackbodies, significant unexplained calibration drifts in some industrial PRTs. With a mandate to build more accurate calibration sources with tens of millikelvin accuracy, SDL began an effort to understand the calibration drifts in small temperature sensors less than an inch long. Testing was performed m...

Motivation Fuel lean combustion is often employed to reduce pollutant emissions (CO, NOx,...) and increase gas turbine lifetime via reduced temperature. However, lean combustion is susceptible to thermoacoustic instabilities and lean blowout (LBO). Thermoacoustic instabilities are due to the coupling of heat release to acoustic oscillations, and lead to reduced combustion efficiency and increas...

This Technology Installation Review describes the installation of a wireless temperature sensor network at the U.S. Environmental Protection Agency (EPA) National Health and Environmental Effects Research Laboratory in Duluth, MN. The objective of the wireless sensor demonstration was to showcase the technology so the experiences with the technology and benefits of the project may be replicated...