Method and system for real-time calculating phase shift signal, plasma diagnostic method and system

A technology of real-time calculation and phase-shift signal, applied in the field of plasma diagnosis, which can solve the problem that the laser is difficult to calculate the phase difference in real-time

Active Publication Date: 2017-02-22
SOUTHWESTERN INST OF PHYSICS
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Problems solved by technology

[0006] The technical problem solved by the present invention is that in the prior art, due to the frequency drift of the laser, it is difficult to realize the real-time calculation of the phase difference during the nuclear fusion test, and then provide a real-time calculation dynamic that can be applied w

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  • Method and system for real-time calculating phase shift signal, plasma diagnostic method and system

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Embodiment Construction

[0040] The technical solutions and beneficial effects of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] The method for real-time calculation of dynamic phase shift signal of the present invention comprises the following steps:

[0042] S01: Segment the intermediate frequency signals of the measurement track and the reference track respectively;

[0043]S02: Read the intermediate frequency signals in the measurement track and the reference track in the current period respectively, and perform A / D conversion into digital signals;

[0044] S03: The obtained digital signals of the measurement track and the reference track in the current period are respectively subjected to Fourier transform and converted into frequency domain signals, and simultaneously find the exact frequencies of the intermediate frequency signals of the measurement track and the reference track in the current period;

[0045...

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Abstract

A method and system for real-time calculating the dynamic phase shift signal are disclosed. The method comprises the following steps: segmenting the medium frequency signals in the testing channel and the reference channel, respectively; reading out the medium frequency signals in the testing channel and the reference channel at the present time period and converting the signals into the digital signals by an A/D conversion, respectively; converting the digital signals in the testing channel and the reference channel obtained at the present time period into the frequency domain signals by Fourier transform, respectively; and synchronously obtaining the accurate frequency at the present time period; and obtaining the phase difference by conducting a conjugate calculation on the frequency domain signals in the reference channel and the testing channel at the present time period according to the accurate frequency at the present time period. A plasma diagnostic method and system are also disclosed. The method and system for real-time calculating the dynamic phase shift signal can achieve the unattended and reliable real-time phase calculation and output, and the plasma diagnostic method and system which use the method and system for real-time calculating the phase shift signal can further reliably achieve the unattended real-time measurement for the electronic density and the current density.

Description

technical field [0001] The invention relates to the field of nuclear fusion plasma diagnosis, and in particular to a method and system for real-time calculation of phase shift signals that can be applied to real-time calculation of dynamic phase shifts of multi-IF signals in polarized light measurement technology. A method and system for calculating a phase-shifted signal A method and system for plasma diagnosis. Background technique [0002] In nuclear fusion devices and physics research, plasma electron density and current density are the most basic and critical physical parameters to study plasma behavior and physics. Relevant research institutions at home and abroad are continuously investing manpower and material resources to research and develop more reliable, real-time, high-space-time-resolution diagnostic techniques and methods to meet the research needs of emerging new physical phenomena. [0003] Usually, the plasma electron density and current density distributi...

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Application Information

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IPC IPC(8): G01R25/00
CPCG01R25/00H05H1/00H03D13/00
Inventor 周艳
Owner SOUTHWESTERN INST OF PHYSICS
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