The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 1988
Filed:
Apr. 18, 1986
Institut de Recherches de la Siderurgie Francaise, Maizieres-Les-Metz, FR;
Abstract
A sample of the steel to be analyzed is subjected to spark discharging, the optical emission of the sparks is directed onto a diffraction grating in order to separate the light emission corresponding to the element to be metered and a capacitor is charged by a current respective of the intensity of this radiation; after every elementary discharge of the integration circuit, the charge of the capacity is converted into the form of a digital data representative of the intensity of the line selected; during a spark discharging cycle, the number of intensities is determined of which the value is included in each one of a plurality of contiguous channels, in order to set up an intensity frequency diagram as a function of the intensity; the curve representing the diagram is smoothed and the content of dissolved element is determined as a linear function of the value of light intensity corresponding to the peak of the gaussian part of the smoothed curve; and the content of precipitated element is determined by summing products n.sub.i, C.sub.i for all the channels located beyond the gaussian part, on the high intensity side, where n.sub.i and C.sub.i are the number of pulses in channel i, and the middle intensity of channel i, respectively.