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

Magnetic resonance three-component noise removing device and noise removing method

A magnetic resonance and three-component technology, applied in measuring devices, electronic magnetic resonance/nuclear magnetic resonance detection, electric/magnetic exploration, etc., can solve the problems of complex interference components, high noise intensity, and difficulty in obtaining filtering effects, etc., to achieve Solve the effect of limited application and good noise cancellation effect

Active Publication Date: 2014-05-28
JILIN UNIV
View PDF5 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of noise interference in magnetic resonance signals, methods such as laying special-shaped coils and increasing the number of signal superpositions, block cancellation, sine cancellation and notch filters are also used to filter out electromagnetic noise. , these methods achieve better results under certain preconditions, but when the noise intensity is large, the interference components are complex, and the frequency difference between the signal center frequency and the power frequency interference is small, it is difficult to obtain a better filtering effect

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
  • Magnetic resonance three-component noise removing device and noise removing method
  • Magnetic resonance three-component noise removing device and noise removing method
  • Magnetic resonance three-component noise removing device and noise removing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The magnetic resonance three-component denoising method is a denoising method that measures the three-component signals of the magnetic resonance and uses a time-domain filtering algorithm to eliminate noise. The system transmits an alternating current with a frequency of the local Larmor frequency through the transmitting coil 6 to the ground, Generates an alternating magnetic field. Under the excitation of the alternating magnetic field formed in the ground, the hydrogen protons in the groundwater produce energy level transitions, and a large number of hydrogen protons transition to high energy levels. When the supply current is removed, these high-energy hydrogen protons will gradually return to the low-energy state, releasing a large number of energy quanta with Larmor frequency, and inducing MRS signals in the receiving coil 7 , reference coil 8 and reference coil 9 . By default, the north-south direction is the x-axis direction, the east-west direction is the y-ax...

Embodiment 2

[0082]The magnetic resonance three-component denoising method is a reference denoising method that measures the magnetic resonance three-component signal and uses a time-domain filtering algorithm to eliminate noise. The system transmits an alternating current with a frequency of the local Larmor frequency through the transmitting coil 6 to the ground , generating an alternating magnetic field. Under the excitation of the alternating magnetic field formed in the ground, the hydrogen protons in the groundwater produce energy level transitions, and a large number of hydrogen protons transition to high energy levels. When the supply current is removed, these high-energy hydrogen protons will gradually return to the low-energy state, releasing a large number of energy quanta with Larmor frequency, and inducing MRS signals in the receiving coil 7, reference coil 8 and reference coil 9. By default, the north-south direction is the x-axis direction, the east-west direction is the y-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 magnetic resonance three-component noise removing device. The magnetic resonance three-component noise removing device is formed through a structure. The structure is characterized in that an upper computer is connected with a transmitting coil through a control system, a transmitting circuit and a resonance matching capacitor; the transmitting circuit is connected with a power supply; the control system is connected with a receiving coil and a reference coil respectively through an A / D (Analog to Digital) collection and amplification circuit and a conditioning circuit. The magnetic resonance three-component noise removing device is applicable to a detection area with complex and changeable environment noise and uneven space distribution of the noise; due to the adoption of relevance between x-component signals, y-component signals and z-component signals which are sensed by coils paved in the same detection place, the z-component noise is removed, then filtered and processed to obtain reliable magnetic resonance signals, so that the wiring space is greatly saved and the processing result is flexible and accurate; in particular, when sharp-peak noise with great amplitude exists, the noise removing effect is excellent. Through the magnetic resonance three-component noise removing device, the influence of strong electromagnetic interference near the cities, the villages and the water-deficient areas is eliminated, and the problem of limited application of a nuclear magnetic resonance underground water detection method is solved.

Description

Technical field: [0001] The invention relates to a geophysical detection method and data interpretation thereof, in particular to a data processing method for collecting a three-component nuclear magnetic resonance (NMR) groundwater detection method and using the three-component magnetic resonance to eliminate noise. Background technique: [0002] As a direct groundwater detection method, the NMR groundwater detection method has the advantages of high resolution, high efficiency, rich information and uniqueness. However, since the signal received by the instrument is very weak (nanovolt level), the high-sensitivity receiving device is easily interfered by the noise components of the surrounding environment. China is densely populated, with well-developed power grids, power lines and electrical equipment covering towns and villages, and the electromagnetic interference is serious, while most of the water-scarce areas are located near cities and villages and other strong inter...

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 Applications(China)
IPC IPC(8): G01V3/14G01V3/38
CPCY02A90/30
Inventor 林婷婷张扬林君万玲张思远杜官峰蒋川东
Owner JILIN UNIV
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