scholarly journals Development of advanced magnetic resonance sensor for industrial applications. Final report

1997 ◽  
Author(s):  
A. De Los Santos
Keyword(s):  
Magnetic Resonance ◽  
Industrial Applications ◽  
Final Report ◽  
Resonance Sensor

scholarly journals Mini Inside-Out Nuclear Magnetic Resonance Sensor Design for Soil Moisture Measurements

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1682 ◽  
Author(s):  
Jiamin Wu ◽  
Pan Guo ◽  
Sheng Shen ◽  
Yucheng He ◽  
Xin Huang ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Soil Moisture ◽  
Magnetic Resonance ◽  
Sandy Soil ◽  
Particle Diameter ◽  
Silica Sand ◽  
Resonance Sensor ◽  
Small Pore ◽  
Inside Out ◽  
Nuclear Magnetic

The improvement of water management in agriculture by exactly detecting moisture parameters of soil is crucial. To investigate this problem, a mini inside-out nuclear magnetic resonance sensor (NMR) was proposed to measure moisture parameters of model soils. This sensor combines three cylindrical magnets that are magnetized in the axial direction and three arc spiral coils of the same size in series. We calculated and optimized the magnet structure by equivalent magnetization to current density. By adjusting the radius and height between the cylinders, a circumferential symmetric constant gradient field (2.28 T/m) was obtained. The NMR sensor was set at 2.424 MHz to measure the water content of sandy soil with small particle diameter and silica sand with large particle diameter. The complete decaying, an NMR signal was analyzed through inverse Laplace transformation and averaged on a T2 space. According to the results, moisture content of the sample is positively correlated with the integral area of T2 spectrum peak (Apeak); T2 of the water in small pores is shorter than that in large pores, because the movement of water molecules are limited by the inner wall of the pores. In the same volume, water in large pore sample is more than that in small pore sample, so Apeak of silica sand is larger than Apeak of sandy soil. Therefore, the sensor is capable of detecting moisture both content and pore size of the sample. This mini sensor (4.0 cm in diameter and 10 cm in length) is portable, and the lowest measurable humidity is 0.38%. Thus, this sensor will allow easy soil moisture measurements on-field in the future.

Analysis of Characteristics of In-Line Magnetic Resonance Sensor

2006 ◽  
Vol 321-323 ◽  
pp. 1221-1224 ◽  
Author(s):  
Seong Min Kim ◽  
Michael J. McCarthy
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Real Time ◽  
Quality Evaluation ◽  
Data Acquisition System ◽  
Internal Quality ◽  
Conveyor System ◽  
Resonance Sensor ◽  
Nmr Techniques

This study was performed to show the feasibility of nuclear magnetic resonance (NMR) techniques for quality evaluation of various agricultural and food products. A real-time in-line NMR quality evaluation sensor was designed, constructed and tested. The device consists of an NMR spectrometer coupled to a conveyor system and a data acquisition system. The conveyor was run at speeds ranging from 0 to 300 mm/s. An NMR signal can be detected when a sample is within ±50 mm of the NMR coil center. The response of NMR sensor was tested using several fruits. The results showed a feasibility of an NMR sensor for evaluating internal quality of various fruits.

scholarly journals Industrial applications study. Volume III. Technology data base evaluation of waste recovery systems. Final report

1977 ◽  
Author(s):  
Harry L. Brown ◽  
Bernard B. Hamel ◽  
Som Karamchetty ◽  
William H. Steigelmann ◽  
Birur C. Gajanana ◽  
...  
Keyword(s):  
Data Base ◽  
Industrial Applications ◽  
Final Report ◽  
Waste Recovery

scholarly journals Development of CVD Diamond for Industrial Applications Final Report CRADA No. TC-2047-02

2017 ◽  
Author(s):  
M. Caplan ◽  
R. Olstad ◽  
H. Jory ◽  
A. L. Vikharov
Keyword(s):  
Cvd Diamond ◽  
Industrial Applications ◽  
Final Report

scholarly journals Dehydration assessment via a portable, single sided magnetic resonance sensor

2019 ◽  
Vol 83 (4) ◽  
pp. 1390-1404 ◽  
Author(s):  
Ashvin Bashyam ◽  
Chris J. Frangieh ◽  
Matthew Li ◽  
Michael J. Cima
Keyword(s):  
Magnetic Resonance ◽  
Resonance Sensor
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