Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Measuring system for reducing signal response time of self-powered neutron detector

A neutron detector and signal response technology, which is applied in the field of neutron flux detection in the reactor core, can solve the problems of long reaction time and insufficient timely control of the core power, and achieve the effect of reducing the response time

Active Publication Date: 2019-11-22
LANZHOU UNIVERSITY +1
View PDF10 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing electronic amplification circuit and the signal current of the secondary instrument have a long reaction time to the change of the neutron flux in the reactor core, which leads to the problem that the control of the core power is not timely enough

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
  • Measuring system for reducing signal response time of self-powered neutron detector
  • Measuring system for reducing signal response time of self-powered neutron detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 2 As shown, the measurement system for reducing the signal response time of a self-powered neutron detector includes a self-powered neutron detector (SPND), a weak current amplifier, an ADC circuit, a single-chip microcomputer, a dual-channel DAC and an amplifying circuit, which are connected in the above ways The self-powered neutron detector signal measurement system can realize the rapid response of the current signal to the change of the monitored core neutron flux. Concrete measurement mode of the present invention is:

[0035] Place a self-powered neutron detector (SPND) in the reactor core, producing a 10 -14 ~10 -5 A-level weak current signal, this weak current signal is input into the weak current amplifier through the double-shielded twin-core transmission cable by means of differential input, and the weak current amplifier amplifies the signal.

[0036] The current output by the weak current amplifier is transmitted to the ADC circuit for a...

Embodiment 2

[0040] The difference between this embodiment and Embodiment 1 is that this embodiment provides the detection process of the self-powered neutron detector when the neutron flux in the reactor core is stable.

[0041] figure 2 The measurement system for reducing the signal response time of a self-powered neutron detector includes a self-powered neutron detector (SPND), a weak current amplifier, an ADC circuit, a single-chip microcomputer, a dual-channel DAC and an amplifier circuit.

[0042] The self-powered neutron detector (SPND) is placed in the detection tunnel of the reactor core, and 10 -14 ~10 -5 A-level weak current signals are transmitted to the outside of the stack through a double-shielded two-core transmission cable and input to a weak current amplifier for preliminary amplification. After the current signal is amplified, it is input to the ADC circuit for analog-to-digital conversion, and the converted digital signal and the signal without analog-to-digital conv...

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 discloses a measuring system for reducing the signal response time of a self-powered neutron detector. The system comprises the self-powered neutron detector, a weak current amplifier, an ADC circuit, a single-chip microcomputer, a double-channel DAC and an amplification circuit, and further comprises a double-shielding double-core cable connected between the self-powered neutron detector and the weak current amplifier, and signal transmission lines among all parts, wherein the differential input of the double-shielded double-core cable and the weak current amplifier can eliminate and reduce interference of space electromagnetism and the background current, the single-chip microcomputer carries out two times of digital dynamic compensation operation of signals so that the response time of neutron flux dynamic change of the current signal is greatly shortened, and accurate and timely monitoring of the neutron flux dynamic change of a reactor core is realized.

Description

technical field [0001] The invention belongs to the technical field of reactor core neutron flux detection and relates to a measurement system for reducing signal response time of a self-powered neutron detector. Background technique [0002] Generally, in a reactor, in order to realize the power control of the reactor and the monitoring of the cumulative radiation dose of each device in the core, self-powered detectors are used for real-time monitoring and measurement. The output current of a self-powered neutron detector is generally 10 -14 ~10 -5 A, the current is small, and it is amplified by the electronic amplifier circuit outside the core and output to the secondary instrument for monitoring. General weak current amplifiers cannot meet the amplification requirements of this magnitude. The electronic amplifier circuit and the current signal of the secondary instrument used have a long reaction time to the change of neutron flux, which limits the reaction to the react...

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
IPC IPC(8): G01T3/00
CPCG01T3/006
Inventor 李东仓朱朝阳邵剑雄杨文华陈熙萌伍晓勇杨磊莫华钧周殿伟周春林邓志勇
Owner LANZHOU UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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