Nuclear magnetic resonance signal real-time noise offsetting device for multiple near-end reference coils

A technology for nuclear magnetic resonance and noise cancellation, applied in electron magnetic resonance/nuclear magnetic resonance detection, measurement devices, electric/magnetic exploration, etc., can solve problems such as inoperable signals, increase the application range, and improve the signal-to-noise ratio , Improve the efficiency of data collection and processing

Active Publication Date: 2014-07-09
JILIN UNIV
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This adaptive noise cancellation system is mainly used for audio signals and crosstalk inter

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
  • Nuclear magnetic resonance signal real-time noise offsetting device for multiple near-end reference coils
  • Nuclear magnetic resonance signal real-time noise offsetting device for multiple near-end reference coils
  • Nuclear magnetic resonance signal real-time noise offsetting device for multiple near-end reference coils

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] figure 1 with figure 2 A block diagram showing a first embodiment of the near-end reference adaptive noise cancellation system of the present invention. When there are multiple noise sources in the measurement environment, multiple near-end referenced receive coils are required. That is, the main signal receiving coil 10 and more than one 20, 30 or even 40 proximal reference receiving coils. The signal of the main receiving coil is expressed as the superposition S(t)+N(t) of the NMR signal and the environmental noise, and the signal received by the near-end reference coil is expressed as the superposition of the NMR signal component and the environmental noise s m (t)+n m (t)(m=1,2...M). The received signal is pre-amplified and filtered by the multi-channel signal conditioning circuits 11, 21, 31 and 41 of the ground nuclear magnetic resonance instrument 1, and then converted into digital quantities by digital-to-analog converters 12, 22, 32 and 42 respectively. S...

Embodiment 2

[0047] image 3 A block diagram showing a second embodiment of the near-end reference adaptive noise cancellation system of the present invention. A main signal receiving coil 10 and a proximal reference receiving coil 20 . The signal of the main receiving coil is expressed as the superposition S(t)+N(t) of the NMR signal S(t) and the environmental noise N(t), and the signal received by the near-end reference coil is expressed as the NMR signal component s 1 (t) and ambient noise n 1 Superposition s of (t) 1 (t)+n 1 (t). The received signal is pre-amplified and filtered by the multi-channel signal conditioning circuits 11 and 21 of the ground nuclear magnetic resonance instrument 1, and then passed through the digital-to-analog converters 12 and 22, respectively converted into digital quantities 13 and 23 and entered into the digital signal processing chip 5. The main signal channel data 13 is denoted as d[n], and the near-end reference signal channel data 23 is denoted a...

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 relates to a nuclear magnetic resonance signal real-time noise offsetting device for multiple near-end reference coils. A main receiving coil and one or more reference receiving coils pass through a multi-channel signal conditioning circuit of a ground nuclear magnetic resonance instrument and are connected with a digital analog converter to be converted into digital values, the digital values are input into a digital signal processing chip, the digital analog converter is connected with a main self-adaptation filter, and reference signal channel digital analog converters are connected with self-adaptation filters respectively. The multiple reference coils can offset the environment noise produced by a plurality of noise sources, the occupied space limit caused by pavement of the coils can be reduced through near-end reference, the application range of the reference coils is widened, the loss of the nuclear magnetic resonance signals collected in the main receiving coil can be avoided through the multiple sets of self-adaptation filters, the signal to noise ratio is improved, the real-time self-adaptation filtering algorithm is achieved through the digital signal processing chip, and data collecting and processing efficiency is improved.

Description

Technical field: [0001] The invention relates to a data collection system and a data processing method, in particular to a system and a method suitable for collecting groundwater nuclear magnetic resonance (Magnetic Resonance Sounding, MRS) signals and performing real-time self-adaptive noise cancellation. Background technique: [0002] The signal of terrestrial NMR is very weak, generally at the nanovolt level, and the environmental noise is very strong, and the NMR signal is usually submerged in the environmental noise. Conventional signal processing methods cannot effectively extract useful NMR signals from environmental noise, and sometimes distort NMR signals. [0003] CN201010537465.2 discloses a nuclear magnetic resonance groundwater detection system and detection method with a reference coil. The multi-channel AD acquisition unit synchronously collects the full waveform data of the nuclear magnetic resonance signal and the noise signal in the reference coil, and uses...

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): G01V3/38G01V3/14
Inventor 蒋川东林君段清明林婷婷曲永星齐鑫陈武强
Owner JILIN UNIV
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap