A method for estimating the temperature of a steel product including a calibration step wherein the intensities at 5 wavelengths ranging from 0.9 to 2.1 ?m are recorded for several measurement condition and spectral attenuation coefficients are computed, a measurement step wherein the intensities at said 5 wavelengths are recorded and spectral attenuation coefficients are computed for several temperatures and a comparison step wherein a probability test is performed to estimate the steel product temperature.

A method and/or system is provided for detecting inclusions (e.g., nickel sulfide based inclusions/defects) in soda-lime-silica based glass, such as float glass. In certain example instances, during and/or after the glass-making process, following the stage in the float process where the glass sheet is formed and floated on a molten material (e.g., tin bath) and cooled or allowed to cool such as via an annealing lehr, visible light from an intense visible light source(s) is directed at the resulting glass and thermal imaging is used to detect inclusions based on a temperature difference between the inclusions and surrounding float glass. In another example embodiment, inclusion detection may be performed without exposure of the glass to light from a light source(s). Inclusions and surrounding glass may cool at different rates and be at different temperatures just prior to and/or after an annealing lehr, and a difference in residual temperature between inclusions and surrounding glass may be detected via thermal imaging and identified to identify inclusion(s).

A thermal detection system for detecting a thermal profile of an optical window may be used in an airborne body that contains a sensor system. The system may include a thermal imager arranged within the airborne body for imaging a portion of the optical window and the portion may coincide with an optical path of the sensor system. The system may further include a processor in communication with the thermal imager for receiving images of the portion and determining a thermal gradient of the portion. The processor may be configured to apply corrections to active optical elements of the sensor system to accommodate for adverse thermal effects on the optical sensor that interferes with the sensor system performance.

A thermal detection system for detecting a thermal profile of an optical window may be used in an airborne body that contains a sensor system. The system may include a thermal imager arranged within the airborne body for imaging a portion of the optical window and the portion may coincide with an optical path of the sensor system. The system may further include a processor in communication with the thermal imager for receiving images of the portion and determining a thermal gradient of the portion. The processor may be configured to apply corrections to active optical elements of the sensor system to accommodate for adverse thermal effects on the optical sensor that interferes with the sensor system performance.

Devices and corresponding methods can be provided to monitor or measure temperature of a target or to control a process. Targets can have low, unknown, or variable emissivity. Devices and corresponding methods can be used to measure temperatures of thin film, partially transparent, or opaque targets, as well as targets not filling a sensor's field of view. Temperature measurements can be made independent of emissivity of a target surface by, for example, inserting a target between a thermopile sensor and a background surface maintained at substantially the same temperature as the thermopile sensor. In embodiment devices and methods, a sensor temperature can be controlled to match a target temperature by minimizing or zeroing a net heat flux at the sensor, as derived from a sensor output signal. Alternatively, a target temperature can be controlled to minimize the heat flux.

A conveyor belt temperature anomaly detection system, comprising: an infrared line scanner having one or more infrared detectors and arranged to scan the surface of a conveyor belt in a direction perpendicular to the direction of travel of the conveyor belt and to generate thermal image data in dependence on infrared radiation detected by the infrared detector; and a processing unit configured to process the thermal image data to identify temperature anomalies in the material travelling on the surface of the conveyor belt.

The present invention relates to an arrangement (1) for measuring the temperature of a web. The arrangement (1) comprises a plurality of sensors (3) for contactless measuring of the temperature, an elongated housing (5) intended for extending essentially along a transverse direction (T) which is transverse to the direction of movement of a web. The sensors (3) are arranged in a chamber (6) within the housing (5) and spread along the front side (7a) of the housing (5). Each sensor (3) is connected to a data bus (9) for providing information of the measured temperature to other systems and/or apparatuses. The sensors (3) are attached to a support structure (19) having at least one rotatable shaft (23) in the interior of the housing (7), and wherein the shaft (23) is arranged to rotate the support structure (19) such that the sensors (3) are displaced to a calibration and/or protection position away from the openings (11) for calibration and/or protection of the sensors (3). The invention also relates to a method for measuring the temperature of a web, a computer program, a computer readable medium and a control unit.

Devices and corresponding methods can be provided to monitor or measure temperature of a target or to control a process. Targets can have low, unknown, or variable emissivity. Devices and corresponding methods can be used to measure temperatures of thin film, partially transparent, or opaque targets, as well as targets not filling a sensor's field of view. Temperature measurements can be made independent of emissivity of a target surface by, for example, inserting a target between a thermopile sensor and a background surface maintained at substantially the same temperature as the thermopile sensor. In embodiment devices and methods, a sensor temperature can be controlled to match a target temperature by minimizing or zeroing a net heat flux at the sensor, as derived from a sensor output signal. Alternatively, a target temperature can be controlled to minimize the heat flux.

Embodiments of a system and a method for detecting voids in a cementitious board can be used in connection with the manufacture of products, including cementitious board products such as gypsum wallboard, for example. Such systems and methods can be used to generate numerical void measurements based upon a series of thermal images obtained during the continuous manufacture of the cementitious board.

A water-mist-penetrating temperature measurement system and method for steel hot rolling, the system including a water-mist-penetrating temperature measurement device, and the water-mist-penetrating temperature measurement device including a visible light guiding-tracking assembly, an optical focusing assembly, a dual-wavelength beam splitting assembly, a multi-source information processing assembly, and a display assembly; and the method including the steps of obtaining a dual-wavelength radiation signal and a visible light image signal of the object to be measured, processing the obtained dual-wavelength radiation signal and the visible light image signal, and detecting and processing an abnormally fluctuated temperature data.