Alloy grade identification method based on pearson correlation coefficient

Abstract

The invention discloses an alloy grade identification method based on a pearson correlation coefficient. The method comprises the steps of (1), determining a matching element set; (2), testing element content information of a to-be-identified sample through a spectrograph and extracting each element content value Xi in the matching element set; (3) extracting a content upper limit Xmaxi value and a lower limit Xmini value of each element of the matching element set in certain grade; (4), establishing a real matching vector Vreal and an ideal matching vector Videal; (5), calculating the pearson correlation coefficient between the real matching vector Vreal and the ideal matching vector Videal; and (6), repeating the steps (3)-(5), until the pearson correlation coefficients of all grades in a grade library are calculated, wherein the grade with the maximum correlation coefficient is the grade to which the to-be-identified sample belongs. According to the method, an operation process is simple, operation results are normalized data, there is no dimension, values are between -1 to 1, the value 1 indicates that the grade matches the test result completely, under the other condition, the more the value is approximate to 1, the higher the matching degree is, and the more the value is approximate to -1, the lower the matching degree is.

Description

technical field [0001] The invention relates to the field of alloy detection, in particular to an alloy grade identification method based on Pearson correlation coefficient. Background technique [0002] Brand identification refers to comparing the measured element content information of the tested sample with the element content range information of several brands in the brand library, and inferring related information such as the brand name of the test object. Brand identification is a new function gradually derived with the development of the alloy testing industry, which greatly facilitates the identification and classification of alloys. [0003] There are few types of existing brand identification methods, which are generally divided into the following categories: (1) Determine whether the detected object is the brand according to whether the measured element content value is within the content range specified by the brand. The disadvantage of this method is that if a ...

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Problems solved by technology

[0005] In view of the above deficiencies, the present invention provides a method for identifying alloy grades based on pearson correlation coefficient, which introduces the correlation coefficient into the problem of grade recognition, which solves the problems of complex calculation and difficult maintenance of traditional algorithms. What is more prominent is that the method not only Applicable to grade identification problems that provide element content ranges and also applicable to grade identification problems that only provide element content reference values

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