Abstract:
An infra-red temperature sensor for sensing the temperature of a medium includes a housing; a thermal infra-red sensor element having a predetermined field of view and disposed in the housing; and a diaphragm closing the housing spaced along an axis from and in the field of view of the thermal sensor element for absorbing on its outer surface heat from the medium and emitting radiation from its inner surface to the thermal sensor element representative of the temperature of the medium.
Abstract:
Device (10) and method for measuring the temperature of the liquid metal (40) in an electric arc furnace (30), or other container similar to a furnace. The device (10) comprises a delivery pipe (14) to deliver a jet of inert gas or air against the layer of slag above the meniscus (41) of liquid metal (40), and optical detection members (22) to detect the temperature. The optical detection members (22) of the temperature are disposed in a position upstream of the entry of the jet of inert gas or air into the delivery pipe (14).
Abstract:
A probe for use within a high voltage and high current electrical device is disclosed. The probe comprises an optical fiber, a substrate having a slot, and a photoluminescent material. The fiber has a first and second end and is configured to convey an activation light from the first to second end. A portion of the fiber is within the slot such that the slot receives the second end of the fiber. Emission of the photoluminescent material, as a function of temperature, is known. The photoluminescent material is disposed within at least a portion of the slot that faces the second end of the fiber so that they are in optical communication with each other. A change in intensity of a luminescent light emitted back into the fiber by the photoluminescent material when the activation light is conveyed by the fiber onto the photoluminescent material provides an indication of the integrity of the electrical device.
Abstract:
Die Erfindung betrifft einen Konverter mit einem Behälter (1) zur Aufnahme geschmolzenen Metalls und einer Messvorrichtung zur optischen Temperaturbestimmung des geschmolzenen Metalls mit einen Lichtwellenleiter (7), um von dem Metall emittierte elektromagnetische Strahlung zu einem optischem Detektor zu leiten, einem optischen Detktor, zur Bestimmung der Temperatur des Metalls aus einer Analyse der elektromagnetischen Strahlung, einer zwischen dem optischen Detektor und dem Behälter angeordneten f luiddurchströmten Leitung (8), in der der Lichtwellenleiter zumindest abschnittweise geführt wird und in der der Lichtwellenleiter mit Hilfe des Fluids transportiert wird, wobei der optische Detektor beabstandet von dem Behälter in einem Bereich angeordnet ist, in dem die Umgebungstemperatur weniger als 150°C beträgt. Ferner betrifft die Erfindung ein Verfahren zur Temperaturbestimmung des geschmolzenen Metalls an einem derartigen Konverter.
Abstract:
A fiber optic temperature sensor (10) and system employ optical (fiber34) and a fiber Bragg grating (36) using non-silica materials that can withstand temperature ranges extending well above the silica-imposed limit of 1,100 degrees C. The system measures the wavelength shift of light reflected from the fiber Bragg grating (36) and converts it into a temperature value. Specific optical fibers include sapphire, which can be used at temperatures approaching 1,800 degrees C, and yttria-stabilized zirconia (YSZ), which can be used at temperature in excess of 2,300 degrees C. One specific grating employs alternating layers of YSZ, with the percentage of yttria varying in the alternating layers to achieve the desired difference of refractive index, and another grating employs alternating layers of alumina and zirconia.
Abstract:
A centrifugal evaporator is described comprising a chamber in which sample containers are carried and rotated by a rotor and are pivotally mounted so as to swing up into a horizontal attitude as the rotor rotates. The evaporator includes an infra red source to direct infra red radiation towards the rotor and the sample containers carried thereon, to heat at least the latter and any sample material therein. A non-contact temperature sensing infra red pyrometer having a sensor with a defined field of view is mounted in the chamber, such that while the rotor as such is substantially out of its field of view, each sample container at least partly occupies the pyrometer field of view for a part of each rotation of the rotor. The positions of the infrared source and the pyrometer components are selected so that the radiation from the infra red source does not impinge on the pyrometer sensor. In particular the infra red source radiation predominantly impinges on the sample containers rather than the rotor. The position of the pyrometer sensor is chosen so that the rotor does not protrude into the pyrometer field of view. The direction of rotation of the rotor is such that any debris thrown from the rotor is directed away from the sensor. Temperature sensing means measures the temperature of the chamber, the pyrometer sensor body and the body of the chamber temperature sensor. Electrical signal processing means receives signals from the IR pyrometer sensor and the temperature sensing means to adjust the temperature values from the IR pyrometer sensor to take account of the chamber temperature, and sensor body temperature.
Abstract:
A device (10) for continuous measurement of the temperature of molten metal in a furnace or recipient for its production and treatment comprises a heat analysis instrument (14) placed in a lance (12) which blows inert gas and/or high-pressure compressed air against a surface of metal slag (18) of a furnace or recipient (20).
Abstract:
The invention relates to a device for reception and transmission of electromagnetic waves in the visible and/or infra-red spectral region and/or the UV-region, emitted by a gaseous, liquid or solid material sample (2), to an analytical unit, preferably for the determination of the temperature of the material sample, comprising a heat-resistant sleeve (5), open at the front end thereof, in which a light wave guide (14), coupled to the analytical unit is provided. In order to record the electromagnetic waves of high intensity the device is characterised by a heat-resistant protective element (12), arranged at the front end region of the sleeve (14) and which conducts electromagnetic waves.
Abstract:
Electric baking oven having a case (1) housing a heating enclosure (2) with a roof (3) comprising a directed opening (4), a device (5) for measuring infrared radiation being mounted behind said opening. Said device (5) determines the temperature of a body (6) placed in the enclosure and includes an infrared sensor (7) mounted on a support (8) and having a housing (9) containing an infrared-sensitive element located opposite a sensing window (11). According to the invention, the infrared radiation measuring device includes means (13) for homogenizing the temperature of the housing (9) of the sensor (7) and the support (8).