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Nuclear pulse signal high speed digital separation method and system and digital spectrometer

A nuclear pulse signal and separation method technology, applied in the field of digital spectrometer, can solve the problem of different pulse width and achieve the effect of high-resolution characteristics

Active Publication Date: 2014-04-09
四川新先达测控技术有限公司
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Problems solved by technology

For the existing trapezoidal shaping algorithm, although the overlapping peaks can be effectively separated, when different shaping parameters are used, the obtained pulse width is not the same

Method used

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  • Nuclear pulse signal high speed digital separation method and system and digital spectrometer
  • Nuclear pulse signal high speed digital separation method and system and digital spectrometer
  • Nuclear pulse signal high speed digital separation method and system and digital spectrometer

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Effect test

experiment example

[0078] Table 1 X-ray fluorescence spectrum test results of traditional digital spectrometer without high-speed digital separation of Mn, Fe, Ni, Cu, Zn, Pb and Sn.

[0079] Table I:

[0080]

[0081]

[0082] Table 2 Mn, Fe, Ni, Cu, Zn, Pb and Sn are based on the X-ray fluorescence spectrum test results of the digital spectrometer given in this application.

[0083] Table II:

[0084]

[0085]Comparing the test results in Table 1 and Table 2, combined with the multi-channel pulse amplitude characteristics and heavy peak characteristics in radioactivity measurement, it can be seen that: high-speed digital separation algorithm is used to separate high-speed nuclear pulse signals. After testing, it is found that the fluorescence spectra before and after modification The shape of the graph has basically not changed, and the resolution of the instrument is around 130ev. However, after adopting the new pulse separation algorithm, the areas of all the characteristic peaks h...

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Abstract

The invention discloses a nuclear pulse signal high speed digital separation method. Data is collected in real time. When collected digital value is larger than a base line, pulse amplitude data start to be collected in real time, and pulse width measurement is started. Meanwhile, the trapezoidal algorithm is used for real-time formation treatment, and consecutive digital pulses are obtained. In the descending process of the pulse amplitude, if the collected digital value is increased by consecutive n points, overlapping peaks occur, and at the moment, the pulse width measurement is stopped, and the overlapping peaks are processed. n is an integer larger than one. The method can identify and process a part of information of the overlapping peaks in real time and achieves the purpose of maintaining good energy resolution ratio on a high radioaction occasion.

Description

technical field [0001] The application belongs to the technical field of data measurement and processing, and relates to a high-speed digital separation method, system and digital spectrometer for nuclear pulse signals for petroleum logging, geological resource exploration, environmental radiation evaluation, production quality control and other radioactive measurement aspects. Background technique [0002] Since the 1990s, multi-channel pulse amplitude analysis technology has been developing towards digitalization. The digital multi-channel pulse amplitude analysis technology is divided into two stages. The first stage is to use DSP to digitally acquire the analog shaped nuclear pulse signal through high-speed ADC, find the peak value directly on the pulse signal, and complete the digital processing of the pulse signal. The second stage is to use DSP or FPGA to digitally acquire the nuclear pulse signal through a high-speed ADC, then carry out digital shaping, and then find...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/36
Inventor 周建斌王敏钟建军赵文斌周伟周靖赵祥
Owner 四川新先达测控技术有限公司
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