Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method to eliminate signal delay of self-powered neutron detector

A neutron detector and self-sufficient energy technology, applied in the field of nuclear measurement, can solve the problems of current value difference, large difference in results, and failure to comprehensively consider fuel consumption, etc., to achieve improved response speed, fast response, and reliable theoretical analysis basis Effect

Active Publication Date: 2019-07-30
CHINA NUCLEAR POWER TECH RES INST CO LTD +2
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing research on delay elimination only analyzes the delay elimination for a certain element, and does not evaluate the commonality of the current and its mechanism generated by the cable under neutron irradiation; secondly, the discrete method adopted It is the Euler discrete method, the results obtained by this method are very different due to the different sampling time, which also makes the calculation process have the risk of instability; moreover, the factor of fuel consumption is not considered comprehensively, and the self-supplied neutron detector After a certain period of use, the number of elements in the emitter will continue to decrease, resulting in differences in current values ​​under the same neutron flux

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method to eliminate signal delay of self-powered neutron detector
  • A method to eliminate signal delay of self-powered neutron detector
  • A method to eliminate signal delay of self-powered neutron detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The following descriptions of various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention can be implemented.

[0030] The principle of the self-powered neutron detector is to rely on the nuclear reaction between the emitter element and the neutron to generate a corresponding micro-current, and determine the neutron flux by measuring the current value. The activated isotope cannot release electrons immediately because of its half-life, so it is necessary to analyze the reaction process of emitter elements and neutrons to determine the method to eliminate the signal delay caused by the half-life. The signal that constitutes a self-powered neutron detector is mainly composed of two major parts, the instantaneous response and the delayed response, and the reaction processes of different elements and neutrons are not the same. The invention can eliminate the signal delay characteristics produced by different eleme...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for eliminating the signal time delay of a self-powered neutron detector. The method comprises the following steps: obtaining a nuclear reaction equation of a neutron and an element of the self-powered neutron detector, a [Beta] decay equation of an activating element and a reaction equation of a [Gamma] ray; establishing a state space model of the reaction of the element of the self-powered neutron detector and the neutron as well as the [Gamma] ray; carrying out accurate discretization on the state space model; collecting a current signal of the self-powered neutron detector which eliminates a background signal of a cable, and combining with an adaptive filtering or kalman filtering method with the discretized state space model to calculate the current signal subjected to time delay elimination; and according to the current signal subjected to time delay elimination, calculating the fuel consumption and the sensitivity of the self-powered neutron detector, and obtaining a corrected neutron flux according to the sensitivity of the self-powered neutron detector. The method can eliminate time delay characteristics, which are caused by a half-life period, of the self-powered neutron detector, and can quickly reflect the change of the neutron flux.

Description

technical field [0001] The invention relates to the technical field of nuclear measurement, in particular to a method for eliminating the signal delay of a self-powered neutron detector. Background technique [0002] Self-powered neutron detectors have the advantages of simple structure, small size, low cost, and no need for external bias power supply. The fuel consumption is different and changes continuously, and the response of the current output also has a certain delay. This makes it difficult for long-term use and accurate measurement of neutron self-sufficient energy detectors because the sensitivity changes too quickly. Through the mathematical modeling of self-powered neutron detectors and the use of corresponding delay elimination algorithms, the response speed of self-powered neutron detectors can be improved to a certain extent, so as to meet the requirements of real-time monitoring of neutron flux in the core. [0003] However, the existing research on delay e...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG16Z99/00
Inventor 吕云峰郭伟张益林黄自平
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com