LABVIEW-based pulsed neutron generator control system

Through the LABVIEW-based pulsed neutron generator control system, a PWM signal with a step size of 8191 and a frequency of 2.5kHz is used to achieve high-precision control of the neutron generator, solving the problem of insufficient control accuracy in the existing technology. The neutron yield fluctuation is controlled within ±1.5%.

CN120669615APending Publication Date: 2025-09-19CHINA NON-FERROUS METALS PROCESSING TECH CO LTD
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Patent Information

Application Number
CN202510892468.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-30
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

The existing pulsed neutron generator control system has insufficient control accuracy, resulting in large fluctuations in neutron yield. The voltage control accuracy of traditional PWM regulation is less than 0.024%, and the neutron yield fluctuation exceeds ±5%.

Method used

A control system based on LABVIEW was adopted, using a PWM signal with a step size of 8191 (13-bit resolution) and a frequency of 2.5kHz. Through the neutron generator industrial computer, the console core board and the driver sampling board, precise control of three independent power supplies was achieved. The voltage control accuracy was improved to 0.012%, and the neutron yield fluctuation was controlled within ±1.5%.

Benefits of technology

The PWM control accuracy has been significantly improved, the voltage control accuracy has been increased by 100%, and the neutron yield fluctuation has been controlled within ±1.5%, which has improved the stability and control accuracy of the system.

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Abstract

The invention discloses a pulsed neutron generator control system based on LabVIEW, and the system comprises a neutron generator industrial personal computer which operates a virtual human-computer interaction interface developed based on LabVIEW; the console core board carries a DSP main control chip and is embedded into a real-time operating system; the driving sampling board is connected with the console core board and is integrated with a signal conditioning circuit; the neutron generator industrial personal computer communicates with the console core board through a Modbus protocol, and controls and drives the sampling board to output control signals of the three independent power supply ion sources, the storage and the acceleration pole to the neutron tube; wherein the console core board generates three paths of PWM signals with the PWM frequency of 2.5 kHz and the step length of 8191, and the three paths of PWM signals are converted into analog control signals through the driving sampling board. According to the control system, the PWM control precision is greatly improved, the voltage control precision is improved to 0.012% (100% higher than that of a conventional scheme) through the combination of the 8191 step length (13-bit resolution) and the 2.5 kHz frequency, and the neutron yield fluctuation is controlled within + / -1.5%.
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