METHOD AND APPARATUS FOR INCREASING SIGNAL TO NOISE RATIO IN AN NQR SYSTEM

摘要

In a method for increasing signal to noise ratio in a Nuclear Quadrapole Resonance (NQR) system comprising the steps of transmitting in a first and second frequency and listening at a third frequency.

主权项

1. A method for increasing signal to noise ratio in a Nuclear Quadrupole Resonance (NQR) system comprising:
transmitting from a first signal generator a first signal at a first frequency (f2); transmitting from a second signal generator a second signal at a second frequency (f3); combining the first and second signals in a combiner; conveying the combined first and second signals to a portal where a material under test is disposed; and listening at a receiver for a third frequency (f1) resulting from a cascading event in the material under test wherein the third frequency is lower than the first and second frequencies thereby avoiding noise in returns at the first and second frequencies.