Hand-held, self-contained optical emission spectroscopy...

G - Physics – 01 – N

Patent

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Details

G01N 21/67 (2006.01) G01J 3/28 (2006.01) G01J 3/443 (2006.01) G01N 21/71 (2006.01)

Patent

CA 2679029

A hand-held, self-contained, battery-powered test instrument for analyzing composition of a sample includes an exciter for exciting at least a portion of the sample, a compact cross-dispersed spectrometer for receiving an optical signal from the excited portion of the sample and a processor for processing spectral data about the optical signal from the spectrometer. The exciter may include a spark generator and a counter electrode, a laser or other device for generating the optical signal from the sample portion. The spectrometer has a wavelength range broad enough to enable the test instrument to detect and determine relative quantities of carbon, phosphorous, sulfur, manganese, silicon, iron and other elements necessary to identify common alloys. The spectrometer includes a structural member made of a light-weight material having a small coefficient of thermal expansion (CTE). The spectrometer is dimensionally stable over a range of expected ambient temperatures, without controlling the temperature of the spectrometer.

L'invention concerne un instrument d'essai alimenté par batterie indépendant portable pour analyser la composition d'un échantillon comprenant un excitateur pour exciter au moins une partie de l'échantillon, un spectromètre à dispersion croisée compact pour recevoir un signal optique provenant de la portion excitée de l'échantillon et un processeur pour traiter des données spectrales autour du signal optique provenant du spectromètre. L'excitateur peut comprendre un générateur d'étincelles et une contre-électrode, un dispositif laser ou un autre dispositif pour générer le signal optique de la portion d'échantillon. Le spectromètre a une gamme de longueurs d'onde suffisamment large pour permettre à l'instrument d'essai de détecter et de déterminer des quantités relatives de carbone, de phosphore, de soufre, de manganèse, de silicium, de fer et d'autres éléments nécessaires pour identifier les alliages courants. Le spectromètre comprend un élément structurel constitué d'un matériau léger ayant un faible coefficient de dilation thermique (CTE). Le spectromètre est stable de manière dimensionnelle sur une gamme de températures ambiantes attendue, sans réguler la température du spectromètre.

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