Method for correcting peak shift

Abstract

The invention discloses a method for correcting peak shift, wherein after the initial functional relation between the energy and the number of channels in a test spectrum is determined via a carbon peak, a hydrogen peak and a leak peak among characteristic peaks, multiple secondary trinomial fittings are performed by utilizing other peaks among the characteristic peaks, thus the final functional relation between the energy and the number of channel in the test spectrum is obtained; and then the characteristic peaks in the test spectrum are enabled to be similar to the characteristic peaks in a standard spectrum to the greatest extent via matching with the standard spectrum, thus the accuracy of the correction is improved.

Description

technical field [0001] The invention relates to the technical field of pulse neutron coal quality analysis, in particular to a peak drift correction method. Background technique [0002] On-line pulse neutron coal quality analysis is an application of prompt gamma neutron activation analysis technology. The difference between it and the traditional coal quality testing methods and methods in the past is that it does not require sampling, sample preparation and sampling operations for the coal to be tested, as long as the testing equipment is installed on the coal conveying belt, the coal will be transported during the coal transportation process. At the same time, the analysis of coal types to be tested was completed. Since this method omits the process of sampling, sample preparation and sampling, it can save testing time and testing cost to a great extent, and is an efficient means of coal quality testing. This method uses neutrons to bombard the coal flow. When the neut...

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Problems solved by technology

[0005] In the process of implementing this application, the inventor found that there are at least the following problems in the prior art: the premise of the above method is that the peak drift of the test spectrum is small, and when the peak drift is large, the characteristic peak may drift out of the designated area , enter other areas adjacent to the designated area, and when searching for characteristic peaks according to the above method, the peak search operation will still be performed in the designated area. Misjudgment, and then corrected according to the difference between the number of channels corresponding to the wrong characteristic peak and the number of channels corresponding to the characteristic peak in the standard spectrum, which reduces the accuracy of peak drift correction

In addition, a large number of peaks are gathered in the high-energy region of the test spectrum, and the distance between each peak is relatively close. At this time, misjudgment of characteristic peaks is very easy to occur, which reduces the accuracy of peak drift correction.

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