Pulse waveform transformation method

A technology of pulse waveform and pulse signal, which is applied in the field of pulse waveform transformation, can solve the problems of reduced accuracy of pulse amplitude, influence on qualitative and quantitative analysis of nuclear energy spectrum, and deterioration of trapezoidal pulse symmetry, so as to improve accuracy and facilitate accurate acquisition , to ensure the effect of reliability

Pending Publication Date: 2020-11-20
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

The existence of the rise time makes the symmetry of the formed trapezoidal pulse worse, resulting in a decrease in the accuracy

Method used

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Embodiment Construction

[0031] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

[0032] In the present invention, the recursive algorithm for trapezoidal shaping of the non-standard negative exponential nuclear pulse signal with slow rising edge is realized through the following specific steps ①~⑥.

[0033] Step ① Express the non-standard negative-exponential core pulse signal with slow rising edge as the following double-exponential pulse signal:

[0034]

[0035] In formula (2), t represents time, τ 1 , τ 2 are the slow time constant and fast time constant of the double-exponential pulse signal respectively, λ is the proportional coefficient, and A is the corre...

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Abstract

The invention discloses a pulse waveform transformation method which is used for trapezoidal forming of non-standard negative exponential nuclear pulse signals. The method comprises: firstly, expressing a non-standard negative exponential nuclear pulse signal with a slowed rising edge as a double-exponential form; secondly, discretizing the double-exponential pulse signal, and performing Z transformation; then, carrying out Z transformation of trapezoidal pulses, solving a transfer function of trapezoidal forming, and establishing a recursion formula of trapezoidal forming, wherein related parameters in the recursion formula are obtained through a genetic algorithm. According to the method, trapezoidal forming of the nuclear pulse signal with the rising edge becoming slow is achieved to acertain extent, the symmetry of trapezoidal pulses is improved, accurate acquisition of pulse amplitudes is facilitated, improvement of the system energy resolution and increase of the counting rate are facilitated, and the method has great significance in improving the accuracy of radioactivity measurement.

Description

technical field [0001] The invention relates to a pulse waveform transformation method. Background technique [0002] Digital pulse shaping technology has become an important shaping method of nuclear pulse signals, which is beneficial to the identification of nuclear signals by digital signal processing, and greatly improves the performance of nuclear instruments. Commonly used digital pulse shaping algorithms mainly include trapezoidal shaping, Gaussian shaping, 1 / f shaping and peak shaping. Based on the research results of scholars at home and abroad, the four commonly used forming methods have their own advantages and disadvantages under different conditions. Among them, although Gaussian shaping is easy to implement and has good filtering effect and noise suppression ability, it is not conducive to the identification of accumulation pulses due to the serious accumulation after forming; the exponential operation contained in the peak pulse shaping algorithm is difficult...

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Application Information

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IPC IPC(8): H03K4/94
CPCH03K4/94
Inventor 黄洪全蒋开明王超
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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