Abstract:
본 발명은 인공 신경망을 이용하여 중첩 피크를 보다 간단하고 신속하게 분리할 수 있도록 하는 중첩 피크 분리 장치 및 이를 이용하는 X선 형광 분석 장치에 관한 것으로, 상기 중첩 피크 분리 장치는 중첩 피크를 포함하는 신호 스펙트럼이 입력되는 입력층, 상기 신호 스펙트럼의 피크 검출값이 출력되는 출력층, 및 상기 입력층과 출력층 사이에 위치하는 은닉층으로 구성되고, 상기 입력층과 은닉층 사이와 상기 은닉층과 출력층 사이는 상기 중첩 피크와 상기 피크 검출값의 상관관계인 연결강도로 연결되는 인공 신경망; 및 상기 인공 신경망에 학습 데이터를 반복 입력하면서, 상기 출력층의 오차율이 목표 오차율에 도달하도록 상기 연결 강도를 조정하는 학습부;를 포함할 수 있다.
Abstract:
The present invention relates to a method to analyze X-ray fluorescence and a method to remove backgrounds for the same, which accurately and efficiently removes backgrounds included in a spectrum for X-ray fluorescence analysis. A method to divide spectrum sections comprises: a step of creating a cumulative graph by performing multi-resolution analysis on spectrum data, and by collecting and accumulating differences of the analysis results; a step of detecting section division points by considering a gradient of the cumulative graph and the gradient rate; a step of dividing the spectrum data into sections based on the section division points; a step of firstly removing the backgrounds included in the spectrum data by classifying sections, where symbols of the differences of the analysis results are crossed and changes into a peak area, and the remaining sections into a background area; and a step of estimating the remaining background in the peak area and secondly removing backgrounds by fitting a beginning point and an end point of the peak area through a linear function or an exponential function.
Abstract:
The present invention relates to a method to divide spectrum sections to apply an interval threshold method even to XRF spectrum data with random properties by dividing the sections of the XRF spectrum using peak size characteristics, and to a method to analyze X-ray fluorescence using the same. The method to divide spectrum sections comprises: a step of reducing spectrum data through down sampling and then differentiating the reduced signal; a step of creating a cumulative graph by accumulating the differentiation results of the reduced signal; a step of detecting section division points using a gradient of the cumulative graph and the gradient rate; and a step of dividing the spectrum data into sections based on the section division points.
Abstract:
The present invention relates to a method for detecting the maximum value of a fluorometric analysis, capable of accurately detecting the maximum value in a trapezoidal filter used for analyzing the components of a substance using X-rays, and an X-ray fluorometric analyzing device using the same. According to the present invention, the method for detecting the maximum value of a fluorometric analysis comprises an output step of outputting a trapezoidal detection signal through a trapezoidal filter used for analyzing the components of a substance using X-rays; a register generation step of generating a register for storing the outputted detection signal value; a storage step of storing the outputted detection signal value in the register; a classification step of identifying whether or not a part belongs to one among increasing, decreasing, and flat top parts by discriminating the code of a value obtained by differentiating the detection signal value, stored in the register; and a detection step of identifying the part as one among an increasing register, a flat top register, and a decreasing register, and detecting the maximum value by recognizing the detection signal value stored in the flat top register. The present invention can reduce the error of the maximum value by extracting the detection signal value of the flat top part close to the decreasing part as the maximum value; thereby accurately extracting the components of the substance.
Abstract:
PURPOSE: A weighted interpolation method using a sub filter is provided to lower hardware complexity in an application which requires an interpolation value at specific time. CONSTITUTION: An interpolation polynomial for new input data is obtained. The new input data are a-&dgr;, b, c, and d. An optimum &dgr; for increasing performance of an interpolation filter is obtained by variously changing &dgr; in a section where t is the same as or larger than 0 and smaller than 1. If a pass band of a sub filter is 0.3π and m is 1, a linear sub phase filter is expressed by the equation which is (&dgr;=C-1x(n-1)+C0x(n)+C0x(n-1)+C1x(n-2)). A weight element(&dgr;W) is applied to increase interpolation performance at specific time.
Abstract:
PURPOSE: A preprocessing method for minimizing an abnormal value influence of spectrum data is provided to supply a result similar to an original signal by reducing an abnormal value found in a spectrum or other signals and performing preprocessing at a low calculation cost. CONSTITUTION: A difference value between a model and a target signal is obtained by selecting a model for the target signal. A noise and an abnormal value getting out of a predetermined range are removed by applying a median filter to the difference value. A preprocessed signal is restored by combining the processed signal with the model. A preprocessing result is obtained by applying smooth algorithm to the restored signal. [Reference numerals] (1) Obtaining a model of a target signal; (2) Applying a median filter to a difference between the model and the target signal; (3) Applying smooth algorithm by adding the filter applied value and the model
Abstract:
The present invention relates to an x-ray fluorescence analyzer and a method of analyzing using the same, which remove a pile-up signal outputted together with a normal signal when analyzing contents of a substance in order to calculate more preferable output value. According to the present invention, the fluorescence analyzer includes an x-ray emitter emitting an x-ray; a maximum value measuring device receiving a fluorescent x-ray reflected after the x-ray is radiated to a substance to be measured and detecting a peak value of the fluorescent x-ray; a signal recognition unit receiving the reflected fluorescent x-ray and differentiating the received fluorescent x-ray to recognize an inputted signal; a pile-up signal measurement unit analyzing the signal recognized by the signal recognition unit to distinguish a pile-up signal; a distinguishing unit distinguishing whether the maximum value can be detected from the pile-up signal; and an output unit outputting the corresponding value if the maximum value can be detected from the pile-up signal. By removing a pile-up signal outputted together with a normal signal, the shape of the maximum value is changed to a more preferred, trapezoidal shape, thereby extracting a maximum value that can be utilized in analysis and improving reliability.