Nuclear magnetic resonance apparatus, systems, and methods
First Claim
1. A method for measuring nuclear magnetic resonance (NMR) in a sample, the method comprising:
- (a) providing an NMR apparatus comprising;
(i) a nuclear magnetic resonance (NMR) transceiver comprising;
(A) a variable-frequency electromagnetic (EM) signal generator comprising a frequency input and an EM signal output;
(B) a frequency controller comprising a frequency output coupled to the frequency input of the variable-frequency EM signal generator, a frequency set-point input, and a frequency measurement input;
(C) an NMR transmission probe comprising an EM signal input coupled to the EM signal output of the variable-frequency EM signal generator;
(D) an NMR receiving probe comprising an EM signal output; and
(E) a mixer comprising a first input coupled to the EM signal output of the NMR receiving probe, a second input coupled to the EM signal output of the variable-frequency EM signal generator, and a mixed EM signal output coupled to the frequency measurement input of the frequency controller;
(ii) a magnet having a magnetic field; and
(iii) a sample container positionable in the magnetic field and proximate to the NMR transmission probe and the NMR receiving probe;
(b) selecting the frequency set-point input to the frequency controller;
(c) placing a sample to be measured for the presence of a magnetic moiety in the sample container;
(d) exciting the sample with an EM signal delivered from the NMR transmission probe, the EM signal having a selected frequency and a selected power;
(e) detecting an NMR signal emitted from the excited sample with the NMR receiving probe; and
(f) determining a new selected frequency for the EM signal delivered from the NMR transmission probe with the frequency controller and an error function determined from (i) the frequency set-point input and (ii) a mixed EM signal from the delivered EM signal and the emitted NMR signal as the frequency measurement input.
2 Assignments
0 Petitions
Accused Products
Abstract
In one aspect, the disclosure relates to a nuclear magnetic resonance transceiver including: (a) a variable-frequency electromagnetic signal generator with (i) a frequency input and (ii) an EM signal output; (b) an electronic frequency controller including (i) a frequency output coupled to the frequency input of the variable-frequency EM signal generator, (ii) an intermediate frequency set-point input, and (iii) an intermediate frequency measurement input; (c) an NMR transmission probe with an EM signal input coupled to the EM signal output of the variable-frequency EM signal generator; (d) an NMR receiving probe with an EM signal output; and (e) an electronic mixer with (i) a first input coupled to the EM signal output of the NMR receiving probe, (ii) a second input coupled to the EM signal output of the variable-frequency EM signal generator, and (iii) a mixed EM signal output coupled to the frequency measurement input of the frequency controller.
25 Citations
27 Claims
-
1. A method for measuring nuclear magnetic resonance (NMR) in a sample, the method comprising:
-
(a) providing an NMR apparatus comprising; (i) a nuclear magnetic resonance (NMR) transceiver comprising; (A) a variable-frequency electromagnetic (EM) signal generator comprising a frequency input and an EM signal output; (B) a frequency controller comprising a frequency output coupled to the frequency input of the variable-frequency EM signal generator, a frequency set-point input, and a frequency measurement input; (C) an NMR transmission probe comprising an EM signal input coupled to the EM signal output of the variable-frequency EM signal generator; (D) an NMR receiving probe comprising an EM signal output; and (E) a mixer comprising a first input coupled to the EM signal output of the NMR receiving probe, a second input coupled to the EM signal output of the variable-frequency EM signal generator, and a mixed EM signal output coupled to the frequency measurement input of the frequency controller; (ii) a magnet having a magnetic field; and (iii) a sample container positionable in the magnetic field and proximate to the NMR transmission probe and the NMR receiving probe; (b) selecting the frequency set-point input to the frequency controller; (c) placing a sample to be measured for the presence of a magnetic moiety in the sample container; (d) exciting the sample with an EM signal delivered from the NMR transmission probe, the EM signal having a selected frequency and a selected power; (e) detecting an NMR signal emitted from the excited sample with the NMR receiving probe; and (f) determining a new selected frequency for the EM signal delivered from the NMR transmission probe with the frequency controller and an error function determined from (i) the frequency set-point input and (ii) a mixed EM signal from the delivered EM signal and the emitted NMR signal as the frequency measurement input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A nuclear magnetic resonance (NMR) transceiver comprising:
-
(a) a variable-frequency electromagnetic (EM) signal generator comprising (i) a frequency input and (ii) an EM signal output; (b) a frequency controller comprising (i) a frequency output coupled to the frequency input of the variable-frequency EM signal generator, (ii) a frequency set-point input, and (iii) a frequency measurement input; (c) an NMR transmission probe comprising an EM signal input coupled to the EM signal output of the variable-frequency EM signal generator; (d) an NMR receiving probe comprising an EM signal output; and (e) a mixer comprising (i) a first input coupled to the EM signal output of the NMR receiving probe, (ii) a second input coupled to the EM signal output of the variable-frequency EM signal generator, and (iii) a mixed EM signal output coupled to the frequency measurement input of the frequency controller. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
Specification