Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1980-05-09
1982-05-11
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324314, G01N 2700
Patent
active
043296467
ABSTRACT:
An impulse resonance spectrometer is provided, wherein high frequency energy in the shape of pulses is applied to a sample material located in a polarizing magnetic field, to detect a nuclear magnetic resonance signal from the sample material. The spectrometer includes a first oscillator which oscillates at a first high frequency for generating a first frequency signal corresponding to a main signal of the nuclear magnetic resonance signal. A nuclear magnetic resonance signal measuring device measures the difference between frequencies of the main signal and a subsidiary signal of the nuclear magnetic resonance signal detected from the sample material by applying the output of the first oscillator to the sample material. A second oscillator in the form of a phase-locked loop oscillates to produce an output corresponding to the frequency signal from the nuclear magnetic resonance signal measuring device, and a mixer modulates the first oscillator output with the output of the second oscillator and oscillates at a second high frequency for applying to the sample material a second frequency signal corresponding to the subsidiary signal.
REFERENCES:
patent: 2960650 (1960-11-01), Pinkleg
patent: 3534252 (1970-10-01), Laukien
patent: 4065714 (1977-12-01), Hill
Hitachi , Ltd.
Tokar Michael J.
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